Finding the Fourth Proportional to 81,940.30, 122,948.72 and 42,475.89

Step by Step Solution

1. Step 1: Write the proportion equation
   81,940.30 : 122,948.72 = 42,475.89 : x
2. Step 2: Convert to fraction form
   81,940.30/122,948.72 = 42,475.89/x
3. Step 3: Cross multiply
   81,940.30x = 122,948.72 × 42,475.89
4. Step 4: Simplify right side
   81,940.30x = 5,222,356,306.36
5. Step 5: Solve for x
   x = 5,222,356,306.36/81,940.30
6. Step 6: Final answer
   x = 63,733.67