Finding the Fourth Proportional to 28,624.24, 42,948.72 and 15,485.86

Step by Step Solution

1. Step 1: Write the proportion equation
   28,624.24 : 42,948.72 = 15,485.86 : x
2. Step 2: Convert to fraction form
   28,624.24/42,948.72 = 15,485.86/x
3. Step 3: Cross multiply
   28,624.24x = 42,948.72 × 15,485.86
4. Step 4: Simplify right side
   28,624.24x = 665,097,865.10
5. Step 5: Solve for x
   x = 665,097,865.10/28,624.24
6. Step 6: Final answer
   x = 23,235.48