Finding the Fourth Proportional to 151,383.42, 208,909.17 and 87,758.10

Step by Step Solution

1. Step 1: Write the proportion equation
   151,383.42 : 208,909.17 = 87,758.10 : x
2. Step 2: Convert to fraction form
   151,383.42/208,909.17 = 87,758.10/x
3. Step 3: Cross multiply
   151,383.42x = 208,909.17 × 87,758.10
4. Step 4: Simplify right side
   151,383.42x = 18,333,471,831.78
5. Step 5: Solve for x
   x = 18,333,471,831.78/151,383.42
6. Step 6: Final answer
   x = 121,106.21