Finding the Fourth Proportional to 10,515.18, 15,748.29 and 5,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,515.18 : 15,748.29 = 5,308.50 : x
2. Step 2: Convert to fraction form
   10,515.18/15,748.29 = 5,308.50/x
3. Step 3: Cross multiply
   10,515.18x = 15,748.29 × 5,308.50
4. Step 4: Simplify right side
   10,515.18x = 83,599,797.47
5. Step 5: Solve for x
   x = 83,599,797.47/10,515.18
6. Step 6: Final answer
   x = 7,950.39