Finding the Fourth Proportional to 71,436.53, 107,132.91 and 49,391.57

Step by Step Solution

1. Step 1: Write the proportion equation
   71,436.53 : 107,132.91 = 49,391.57 : x
2. Step 2: Convert to fraction form
   71,436.53/107,132.91 = 49,391.57/x
3. Step 3: Cross multiply
   71,436.53x = 107,132.91 × 49,391.57
4. Step 4: Simplify right side
   71,436.53x = 5,291,462,087.90
5. Step 5: Solve for x
   x = 5,291,462,087.90/71,436.53
6. Step 6: Final answer
   x = 74,072.22