Finding the Fourth Proportional to 11,003.90, 16,507.24 and 5,381.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.90 : 16,507.24 = 5,381.76 : x
2. Step 2: Convert to fraction form
   11,003.90/16,507.24 = 5,381.76/x
3. Step 3: Cross multiply
   11,003.90x = 16,507.24 × 5,381.76
4. Step 4: Simplify right side
   11,003.90x = 88,838,003.94
5. Step 5: Solve for x
   x = 88,838,003.94/11,003.90
6. Step 6: Final answer
   x = 8,073.32