Finding the Fourth Proportional to 10,999.38, 15,182.58 and 7,419.53

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.38 : 15,182.58 = 7,419.53 : x
2. Step 2: Convert to fraction form
   10,999.38/15,182.58 = 7,419.53/x
3. Step 3: Cross multiply
   10,999.38x = 15,182.58 × 7,419.53
4. Step 4: Simplify right side
   10,999.38x = 112,647,531.87
5. Step 5: Solve for x
   x = 112,647,531.87/10,999.38
6. Step 6: Final answer
   x = 10,241.26