Finding the Fourth Proportional to 81,938.30, 122,945.72 and 42,473.88

Step by Step Solution

1. Step 1: Write the proportion equation
   81,938.30 : 122,945.72 = 42,473.88 : x
2. Step 2: Convert to fraction form
   81,938.30/122,945.72 = 42,473.88/x
3. Step 3: Cross multiply
   81,938.30x = 122,945.72 × 42,473.88
4. Step 4: Simplify right side
   81,938.30x = 5,221,981,757.79
5. Step 5: Solve for x
   x = 5,221,981,757.79/81,938.30
6. Step 6: Final answer
   x = 63,730.66