Finding the Fourth Proportional to 42,441.12, 63,687.60 and 21,666.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,441.12 : 63,687.60 = 21,666.24 : x
2. Step 2: Convert to fraction form
   42,441.12/63,687.60 = 21,666.24/x
3. Step 3: Cross multiply
   42,441.12x = 63,687.60 × 21,666.24
4. Step 4: Simplify right side
   42,441.12x = 1,379,870,826.62
5. Step 5: Solve for x
   x = 1,379,870,826.62/42,441.12
6. Step 6: Final answer
   x = 32,512.59