Finding the Fourth Proportional to 28,196.87, 42,284.37 and 15,042.07

Step by Step Solution

1. Step 1: Write the proportion equation
   28,196.87 : 42,284.37 = 15,042.07 : x
2. Step 2: Convert to fraction form
   28,196.87/42,284.37 = 15,042.07/x
3. Step 3: Cross multiply
   28,196.87x = 42,284.37 × 15,042.07
4. Step 4: Simplify right side
   28,196.87x = 636,044,242.02
5. Step 5: Solve for x
   x = 636,044,242.02/28,196.87
6. Step 6: Final answer
   x = 22,557.26