Finding the Fourth Proportional to 15,417.72, 23,128.56 and 5,558.04

Step by Step Solution

1. Step 1: Write the proportion equation
   15,417.72 : 23,128.56 = 5,558.04 : x
2. Step 2: Convert to fraction form
   15,417.72/23,128.56 = 5,558.04/x
3. Step 3: Cross multiply
   15,417.72x = 23,128.56 × 5,558.04
4. Step 4: Simplify right side
   15,417.72x = 128,549,461.62
5. Step 5: Solve for x
   x = 128,549,461.62/15,417.72
6. Step 6: Final answer
   x = 8,337.77