Finding the Fourth Proportional to 28,441.74, 42,648.55 and 8,715.54

Step by Step Solution

1. Step 1: Write the proportion equation
   28,441.74 : 42,648.55 = 8,715.54 : x
2. Step 2: Convert to fraction form
   28,441.74/42,648.55 = 8,715.54/x
3. Step 3: Cross multiply
   28,441.74x = 42,648.55 × 8,715.54
4. Step 4: Simplify right side
   28,441.74x = 371,705,143.47
5. Step 5: Solve for x
   x = 371,705,143.47/28,441.74
6. Step 6: Final answer
   x = 13,069.00