Finding the Fourth Proportional to 2,056,478,594.63, 3,082,565,142.59 and 860,639,489.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056,478,594.63 : 3,082,565,142.59 = 860,639,489.69 : x
2. Step 2: Convert to fraction form
   2,056,478,594.63/3,082,565,142.59 = 860,639,489.69/x
3. Step 3: Cross multiply
   2,056,478,594.63x = 3,082,565,142.59 × 860,639,489.69
4. Step 4: Simplify right side
   2,056,478,594.63x = 2,652,977,291,235,123,712
5. Step 5: Solve for x
   x = 2,652,977,291,235,123,712/2,056,478,594.63
6. Step 6: Final answer
   x = 1,290,058,305.58