Finding the Fourth Proportional to 10,045.71, 15,079.50 and 7,405.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,045.71 : 15,079.50 = 7,405.02 : x
2. Step 2: Convert to fraction form
   10,045.71/15,079.50 = 7,405.02/x
3. Step 3: Cross multiply
   10,045.71x = 15,079.50 × 7,405.02
4. Step 4: Simplify right side
   10,045.71x = 111,663,999.09
5. Step 5: Solve for x
   x = 111,663,999.09/10,045.71
6. Step 6: Final answer
   x = 11,115.59