Finding the Fourth Proportional to 10,123.47, 13,972.19 and 7,729.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.47 : 13,972.19 = 7,729.52 : x
2. Step 2: Convert to fraction form
   10,123.47/13,972.19 = 7,729.52/x
3. Step 3: Cross multiply
   10,123.47x = 13,972.19 × 7,729.52
4. Step 4: Simplify right side
   10,123.47x = 107,998,213.54
5. Step 5: Solve for x
   x = 107,998,213.54/10,123.47
6. Step 6: Final answer
   x = 10,668.10