Finding the Fourth Proportional to 42,380.16, 63,520.64 and 28,323.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,380.16 : 63,520.64 = 28,323.20 : x
2. Step 2: Convert to fraction form
   42,380.16/63,520.64 = 28,323.20/x
3. Step 3: Cross multiply
   42,380.16x = 63,520.64 × 28,323.20
4. Step 4: Simplify right side
   42,380.16x = 1,799,107,790.85
5. Step 5: Solve for x
   x = 1,799,107,790.85/42,380.16
6. Step 6: Final answer
   x = 42,451.65