Finding the Fourth Proportional to 42,399.98, 63,613.79 and 21,329.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,399.98 : 63,613.79 = 21,329.15 : x
2. Step 2: Convert to fraction form
   42,399.98/63,613.79 = 21,329.15/x
3. Step 3: Cross multiply
   42,399.98x = 63,613.79 × 21,329.15
4. Step 4: Simplify right side
   42,399.98x = 1,356,827,764.01
5. Step 5: Solve for x
   x = 1,356,827,764.01/42,399.98
6. Step 6: Final answer
   x = 32,000.67