Finding the Fourth Proportional to 10,077.43, 15,104.39 and 7,405.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,077.43 : 15,104.39 = 7,405.15 : x
2. Step 2: Convert to fraction form
   10,077.43/15,104.39 = 7,405.15/x
3. Step 3: Cross multiply
   10,077.43x = 15,104.39 × 7,405.15
4. Step 4: Simplify right side
   10,077.43x = 111,850,273.61
5. Step 5: Solve for x
   x = 111,850,273.61/10,077.43
6. Step 6: Final answer
   x = 11,099.09