Finding the Fourth Proportional to 99,664.63, 137,548.86 and 56,650.59

Step by Step Solution

1. Step 1: Write the proportion equation
   99,664.63 : 137,548.86 = 56,650.59 : x
2. Step 2: Convert to fraction form
   99,664.63/137,548.86 = 56,650.59/x
3. Step 3: Cross multiply
   99,664.63x = 137,548.86 × 56,650.59
4. Step 4: Simplify right side
   99,664.63x = 7,792,223,385.08
5. Step 5: Solve for x
   x = 7,792,223,385.08/99,664.63
6. Step 6: Final answer
   x = 78,184.44