Finding the Fourth Proportional to 10,073.55, 15,112.89 and 5,143.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,073.55 : 15,112.89 = 5,143.08 : x
2. Step 2: Convert to fraction form
   10,073.55/15,112.89 = 5,143.08/x
3. Step 3: Cross multiply
   10,073.55x = 15,112.89 × 5,143.08
4. Step 4: Simplify right side
   10,073.55x = 77,726,802.30
5. Step 5: Solve for x
   x = 77,726,802.30/10,073.55
6. Step 6: Final answer
   x = 7,715.93