Finding the Fourth Proportional to 11,003.90, 15,188.81 and 7,424.03

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.90 : 15,188.81 = 7,424.03 : x
2. Step 2: Convert to fraction form
   11,003.90/15,188.81 = 7,424.03/x
3. Step 3: Cross multiply
   11,003.90x = 15,188.81 × 7,424.03
4. Step 4: Simplify right side
   11,003.90x = 112,762,068.04
5. Step 5: Solve for x
   x = 112,762,068.04/11,003.90
6. Step 6: Final answer
   x = 10,247.47