Finding the Fourth Proportional to 11,139.48, 15,372.72 and 6,103.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,139.48 : 15,372.72 = 6,103.80 : x
2. Step 2: Convert to fraction form
   11,139.48/15,372.72 = 6,103.80/x
3. Step 3: Cross multiply
   11,139.48x = 15,372.72 × 6,103.80
4. Step 4: Simplify right side
   11,139.48x = 93,832,008.34
5. Step 5: Solve for x
   x = 93,832,008.34/11,139.48
6. Step 6: Final answer
   x = 8,423.37