Finding the Fourth Proportional to 42,399.82, 63,613.55 and 21,328.99

Step by Step Solution

1. Step 1: Write the proportion equation
   42,399.82 : 63,613.55 = 21,328.99 : x
2. Step 2: Convert to fraction form
   42,399.82/63,613.55 = 21,328.99/x
3. Step 3: Cross multiply
   42,399.82x = 63,613.55 × 21,328.99
4. Step 4: Simplify right side
   42,399.82x = 1,356,812,765.73
5. Step 5: Solve for x
   x = 1,356,812,765.73/42,399.82
6. Step 6: Final answer
   x = 32,000.44