Finding the Fourth Proportional to 131,687.27, 197,551.40 and 42,920.18

Step by Step Solution

1. Step 1: Write the proportion equation
   131,687.27 : 197,551.40 = 42,920.18 : x
2. Step 2: Convert to fraction form
   131,687.27/197,551.40 = 42,920.18/x
3. Step 3: Cross multiply
   131,687.27x = 197,551.40 × 42,920.18
4. Step 4: Simplify right side
   131,687.27x = 8,478,940,444.89
5. Step 5: Solve for x
   x = 8,478,940,444.89/131,687.27
6. Step 6: Final answer
   x = 64,386.94