Finding the Fourth Proportional to 236,499.92, 354,538.89 and 86,705.24

Step by Step Solution

1. Step 1: Write the proportion equation
   236,499.92 : 354,538.89 = 86,705.24 : x
2. Step 2: Convert to fraction form
   236,499.92/354,538.89 = 86,705.24/x
3. Step 3: Cross multiply
   236,499.92x = 354,538.89 × 86,705.24
4. Step 4: Simplify right side
   236,499.92x = 30,740,377,774.09
5. Step 5: Solve for x
   x = 30,740,377,774.09/236,499.92
6. Step 6: Final answer
   x = 129,980.50