Finding the Fourth Proportional to 113,978.89, 157,291.06 and 62,991.61

Step by Step Solution

1. Step 1: Write the proportion equation
   113,978.89 : 157,291.06 = 62,991.61 : x
2. Step 2: Convert to fraction form
   113,978.89/157,291.06 = 62,991.61/x
3. Step 3: Cross multiply
   113,978.89x = 157,291.06 × 62,991.61
4. Step 4: Simplify right side
   113,978.89x = 9,908,016,675.41
5. Step 5: Solve for x
   x = 9,908,016,675.41/113,978.89
6. Step 6: Final answer
   x = 86,928.52