Finding the Fourth Proportional to 28,590.38, 42,900.18 and 13,614.44

Step by Step Solution

1. Step 1: Write the proportion equation
   28,590.38 : 42,900.18 = 13,614.44 : x
2. Step 2: Convert to fraction form
   28,590.38/42,900.18 = 13,614.44/x
3. Step 3: Cross multiply
   28,590.38x = 42,900.18 × 13,614.44
4. Step 4: Simplify right side
   28,590.38x = 584,061,926.60
5. Step 5: Solve for x
   x = 584,061,926.60/28,590.38
6. Step 6: Final answer
   x = 20,428.62