Finding the Fourth Proportional to 71,404.75, 98,538.56 and 39,578.43

Step by Step Solution

1. Step 1: Write the proportion equation
   71,404.75 : 98,538.56 = 39,578.43 : x
2. Step 2: Convert to fraction form
   71,404.75/98,538.56 = 39,578.43/x
3. Step 3: Cross multiply
   71,404.75x = 98,538.56 × 39,578.43
4. Step 4: Simplify right side
   71,404.75x = 3,900,001,499.26
5. Step 5: Solve for x
   x = 3,900,001,499.26/71,404.75
6. Step 6: Final answer
   x = 54,618.24