Finding the Fourth Proportional to 137,566.69, 189,761.40 and 86,498.50

Step by Step Solution

1. Step 1: Write the proportion equation
   137,566.69 : 189,761.40 = 86,498.50 : x
2. Step 2: Convert to fraction form
   137,566.69/189,761.40 = 86,498.50/x
3. Step 3: Cross multiply
   137,566.69x = 189,761.40 × 86,498.50
4. Step 4: Simplify right side
   137,566.69x = 16,414,076,457.90
5. Step 5: Solve for x
   x = 16,414,076,457.90/137,566.69
6. Step 6: Final answer
   x = 119,317.23