Finding the Fourth Proportional to 99,691.67, 137,496.72 and 63,885.02

Step by Step Solution

1. Step 1: Write the proportion equation
   99,691.67 : 137,496.72 = 63,885.02 : x
2. Step 2: Convert to fraction form
   99,691.67/137,496.72 = 63,885.02/x
3. Step 3: Cross multiply
   99,691.67x = 137,496.72 × 63,885.02
4. Step 4: Simplify right side
   99,691.67x = 8,783,980,259.22
5. Step 5: Solve for x
   x = 8,783,980,259.22/99,691.67
6. Step 6: Final answer
   x = 88,111.47