Finding the Fourth Proportional to 52,310.86, 78,466.32 and 12,868.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,310.86 : 78,466.32 = 12,868.72 : x
2. Step 2: Convert to fraction form
   52,310.86/78,466.32 = 12,868.72/x
3. Step 3: Cross multiply
   52,310.86x = 78,466.32 × 12,868.72
4. Step 4: Simplify right side
   52,310.86x = 1,009,761,101.51
5. Step 5: Solve for x
   x = 1,009,761,101.51/52,310.86
6. Step 6: Final answer
   x = 19,303.09