Finding the Fourth Proportional to 10,558.20, 15,822.72 and 10,242.84

Step by Step Solution

1. Step 1: Write the proportion equation
   10,558.20 : 15,822.72 = 10,242.84 : x
2. Step 2: Convert to fraction form
   10,558.20/15,822.72 = 10,242.84/x
3. Step 3: Cross multiply
   10,558.20x = 15,822.72 × 10,242.84
4. Step 4: Simplify right side
   10,558.20x = 162,069,589.32
5. Step 5: Solve for x
   x = 162,069,589.32/10,558.20
6. Step 6: Final answer
   x = 15,350.12