Finding the Fourth Proportional to 10,780.06, 14,841.72 and 8,387.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,780.06 : 14,841.72 = 8,387.10 : x
2. Step 2: Convert to fraction form
   10,780.06/14,841.72 = 8,387.10/x
3. Step 3: Cross multiply
   10,780.06x = 14,841.72 × 8,387.10
4. Step 4: Simplify right side
   10,780.06x = 124,478,989.81
5. Step 5: Solve for x
   x = 124,478,989.81/10,780.06
6. Step 6: Final answer
   x = 11,547.15