Finding the Fourth Proportional to 28,249.83, 42,375.15 and 13,460.31

Step by Step Solution

1. Step 1: Write the proportion equation
   28,249.83 : 42,375.15 = 13,460.31 : x
2. Step 2: Convert to fraction form
   28,249.83/42,375.15 = 13,460.31/x
3. Step 3: Cross multiply
   28,249.83x = 42,375.15 × 13,460.31
4. Step 4: Simplify right side
   28,249.83x = 570,382,655.30
5. Step 5: Solve for x
   x = 570,382,655.30/28,249.83
6. Step 6: Final answer
   x = 20,190.66