Finding the Fourth Proportional to 10,929.90, 15,046.78 and 10,427.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,929.90 : 15,046.78 = 10,427.76 : x
2. Step 2: Convert to fraction form
   10,929.90/15,046.78 = 10,427.76/x
3. Step 3: Cross multiply
   10,929.90x = 15,046.78 × 10,427.76
4. Step 4: Simplify right side
   10,929.90x = 156,904,204.10
5. Step 5: Solve for x
   x = 156,904,204.10/10,929.90
6. Step 6: Final answer
   x = 14,355.50