Finding the Fourth Proportional to 71,248.78, 98,354.82 and 42,578.56

Step by Step Solution

1. Step 1: Write the proportion equation
   71,248.78 : 98,354.82 = 42,578.56 : x
2. Step 2: Convert to fraction form
   71,248.78/98,354.82 = 42,578.56/x
3. Step 3: Cross multiply
   71,248.78x = 98,354.82 × 42,578.56
4. Step 4: Simplify right side
   71,248.78x = 4,187,806,604.66
5. Step 5: Solve for x
   x = 4,187,806,604.66/71,248.78
6. Step 6: Final answer
   x = 58,777.24