Finding the Fourth Proportional to 102,656.42, 141,661.86 and 64,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,656.42 : 141,661.86 = 64,436.50 : x
2. Step 2: Convert to fraction form
   102,656.42/141,661.86 = 64,436.50/x
3. Step 3: Cross multiply
   102,656.42x = 141,661.86 × 64,436.50
4. Step 4: Simplify right side
   102,656.42x = 9,128,194,441.89
5. Step 5: Solve for x
   x = 9,128,194,441.89/102,656.42
6. Step 6: Final answer
   x = 88,919.86