Finding the Fourth Proportional to 28,372.72, 42,494.22 and 13,592.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,372.72 : 42,494.22 = 13,592.08 : x
2. Step 2: Convert to fraction form
   28,372.72/42,494.22 = 13,592.08/x
3. Step 3: Cross multiply
   28,372.72x = 42,494.22 × 13,592.08
4. Step 4: Simplify right side
   28,372.72x = 577,584,837.78
5. Step 5: Solve for x
   x = 577,584,837.78/28,372.72
6. Step 6: Final answer
   x = 20,357.05