Finding the Fourth Proportional to 117,188.72, 161,675.82 and 86,635.20

Step by Step Solution

1. Step 1: Write the proportion equation
   117,188.72 : 161,675.82 = 86,635.20 : x
2. Step 2: Convert to fraction form
   117,188.72/161,675.82 = 86,635.20/x
3. Step 3: Cross multiply
   117,188.72x = 161,675.82 × 86,635.20
4. Step 4: Simplify right side
   117,188.72x = 14,006,817,000.86
5. Step 5: Solve for x
   x = 14,006,817,000.86/117,188.72
6. Step 6: Final answer
   x = 119,523.59