Finding the Fourth Proportional to 52,128.49, 78,193.17 and 34,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   52,128.49 : 78,193.17 = 34,131.89 : x
2. Step 2: Convert to fraction form
   52,128.49/78,193.17 = 34,131.89/x
3. Step 3: Cross multiply
   52,128.49x = 78,193.17 × 34,131.89
4. Step 4: Simplify right side
   52,128.49x = 2,668,880,862.64
5. Step 5: Solve for x
   x = 2,668,880,862.64/52,128.49
6. Step 6: Final answer
   x = 51,198.12