Finding the Fourth Proportional to 11,139.03, 15,379.02 and 9,941.94

Step by Step Solution

1. Step 1: Write the proportion equation
   11,139.03 : 15,379.02 = 9,941.94 : x
2. Step 2: Convert to fraction form
   11,139.03/15,379.02 = 9,941.94/x
3. Step 3: Cross multiply
   11,139.03x = 15,379.02 × 9,941.94
4. Step 4: Simplify right side
   11,139.03x = 152,897,294.10
5. Step 5: Solve for x
   x = 152,897,294.10/11,139.03
6. Step 6: Final answer
   x = 13,726.27