Finding the Fourth Proportional to 151,111.38, 208,540.76 and 87,436.86

Step by Step Solution

1. Step 1: Write the proportion equation
   151,111.38 : 208,540.76 = 87,436.86 : x
2. Step 2: Convert to fraction form
   151,111.38/208,540.76 = 87,436.86/x
3. Step 3: Cross multiply
   151,111.38x = 208,540.76 × 87,436.86
4. Step 4: Simplify right side
   151,111.38x = 18,234,148,799.23
5. Step 5: Solve for x
   x = 18,234,148,799.23/151,111.38
6. Step 6: Final answer
   x = 120,666.95