Finding the Fourth Proportional to 10,972.71, 15,130.33 and 7,429.77

Step by Step Solution

1. Step 1: Write the proportion equation
   10,972.71 : 15,130.33 = 7,429.77 : x
2. Step 2: Convert to fraction form
   10,972.71/15,130.33 = 7,429.77/x
3. Step 3: Cross multiply
   10,972.71x = 15,130.33 × 7,429.77
4. Step 4: Simplify right side
   10,972.71x = 112,414,853.35
5. Step 5: Solve for x
   x = 112,414,853.35/10,972.71
6. Step 6: Final answer
   x = 10,244.95