Finding the Fourth Proportional to 57,949.12, 86,874.32 and 56,276.07

Step by Step Solution

1. Step 1: Write the proportion equation
   57,949.12 : 86,874.32 = 56,276.07 : x
2. Step 2: Convert to fraction form
   57,949.12/86,874.32 = 56,276.07/x
3. Step 3: Cross multiply
   57,949.12x = 86,874.32 × 56,276.07
4. Step 4: Simplify right side
   57,949.12x = 4,888,945,128.43
5. Step 5: Solve for x
   x = 4,888,945,128.43/57,949.12
6. Step 6: Final answer
   x = 84,366.17