Finding the Fourth Proportional to 28,369.18, 42,560.25 and 13,581.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,369.18 : 42,560.25 = 13,581.82 : x
2. Step 2: Convert to fraction form
   28,369.18/42,560.25 = 13,581.82/x
3. Step 3: Cross multiply
   28,369.18x = 42,560.25 × 13,581.82
4. Step 4: Simplify right side
   28,369.18x = 578,045,654.66
5. Step 5: Solve for x
   x = 578,045,654.66/28,369.18
6. Step 6: Final answer
   x = 20,375.83