Finding the Fourth Proportional to 156,086.33, 215,410.37 and 88,109.10

Step by Step Solution

1. Step 1: Write the proportion equation
   156,086.33 : 215,410.37 = 88,109.10 : x
2. Step 2: Convert to fraction form
   156,086.33/215,410.37 = 88,109.10/x
3. Step 3: Cross multiply
   156,086.33x = 215,410.37 × 88,109.10
4. Step 4: Simplify right side
   156,086.33x = 18,979,613,390.82
5. Step 5: Solve for x
   x = 18,979,613,390.82/156,086.33
6. Step 6: Final answer
   x = 121,596.90