Finding the Fourth Proportional to 113,970.72, 157,279 and 62,987.04

Step by Step Solution

1. Step 1: Write the proportion equation
   113,970.72 : 157,279 = 62,987.04 : x
2. Step 2: Convert to fraction form
   113,970.72/157,279 = 62,987.04/x
3. Step 3: Cross multiply
   113,970.72x = 157,279 × 62,987.04
4. Step 4: Simplify right side
   113,970.72x = 9,906,538,664.16
5. Step 5: Solve for x
   x = 9,906,538,664.16/113,970.72
6. Step 6: Final answer
   x = 86,921.79