Finding the Fourth Proportional to 10,158.49, 15,241.20 and 5,478.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,158.49 : 15,241.20 = 5,478.94 : x
2. Step 2: Convert to fraction form
   10,158.49/15,241.20 = 5,478.94/x
3. Step 3: Cross multiply
   10,158.49x = 15,241.20 × 5,478.94
4. Step 4: Simplify right side
   10,158.49x = 83,505,620.33
5. Step 5: Solve for x
   x = 83,505,620.33/10,158.49
6. Step 6: Final answer
   x = 8,220.28