Finding the Fourth Proportional to 151,061.12, 208,490.44 and 87,434

Step by Step Solution

1. Step 1: Write the proportion equation
   151,061.12 : 208,490.44 = 87,434 : x
2. Step 2: Convert to fraction form
   151,061.12/208,490.44 = 87,434/x
3. Step 3: Cross multiply
   151,061.12x = 208,490.44 × 87,434
4. Step 4: Simplify right side
   151,061.12x = 18,229,153,130.96
5. Step 5: Solve for x
   x = 18,229,153,130.96/151,061.12
6. Step 6: Final answer
   x = 120,674.02