Finding the Fourth Proportional to 98,700.30, 136,209.96 and 56,251.98

Step by Step Solution

1. Step 1: Write the proportion equation
   98,700.30 : 136,209.96 = 56,251.98 : x
2. Step 2: Convert to fraction form
   98,700.30/136,209.96 = 56,251.98/x
3. Step 3: Cross multiply
   98,700.30x = 136,209.96 × 56,251.98
4. Step 4: Simplify right side
   98,700.30x = 7,662,079,945.72
5. Step 5: Solve for x
   x = 7,662,079,945.72/98,700.30
6. Step 6: Final answer
   x = 77,629.75