Finding the Fourth Proportional to 11,419.64, 17,139.18 and 4,499

Step by Step Solution

1. Step 1: Write the proportion equation
   11,419.64 : 17,139.18 = 4,499 : x
2. Step 2: Convert to fraction form
   11,419.64/17,139.18 = 4,499/x
3. Step 3: Cross multiply
   11,419.64x = 17,139.18 × 4,499
4. Step 4: Simplify right side
   11,419.64x = 77,109,170.82
5. Step 5: Solve for x
   x = 77,109,170.82/11,419.64
6. Step 6: Final answer
   x = 6,752.33