Finding the Fourth Proportional to 56,243,874.61, 84,365,210.49 and 42,680,319.31

Step by Step Solution

1. Step 1: Write the proportion equation
   56,243,874.61 : 84,365,210.49 = 42,680,319.31 : x
2. Step 2: Convert to fraction form
   56,243,874.61/84,365,210.49 = 42,680,319.31/x
3. Step 3: Cross multiply
   56,243,874.61x = 84,365,210.49 × 42,680,319.31
4. Step 4: Simplify right side
   56,243,874.61x = 3,600,734,122,368,561.50
5. Step 5: Solve for x
   x = 3,600,734,122,368,561.50/56,243,874.61
6. Step 6: Final answer
   x = 64,020,022.58