Finding the Fourth Proportional to 28,715.16, 42,980.52 and 15,354.71

Step by Step Solution

1. Step 1: Write the proportion equation
   28,715.16 : 42,980.52 = 15,354.71 : x
2. Step 2: Convert to fraction form
   28,715.16/42,980.52 = 15,354.71/x
3. Step 3: Cross multiply
   28,715.16x = 42,980.52 × 15,354.71
4. Step 4: Simplify right side
   28,715.16x = 659,953,665.87
5. Step 5: Solve for x
   x = 659,953,665.87/28,715.16
6. Step 6: Final answer
   x = 22,982.76