Finding the Fourth Proportional to 11,331.72, 17,008.71 and 7,438.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,331.72 : 17,008.71 = 7,438.86 : x
2. Step 2: Convert to fraction form
   11,331.72/17,008.71 = 7,438.86/x
3. Step 3: Cross multiply
   11,331.72x = 17,008.71 × 7,438.86
4. Step 4: Simplify right side
   11,331.72x = 126,525,412.47
5. Step 5: Solve for x
   x = 126,525,412.47/11,331.72
6. Step 6: Final answer
   x = 11,165.60