Finding the Fourth Proportional to 38,002.55, 52,443.50 and 21,006.81

Step by Step Solution

1. Step 1: Write the proportion equation
   38,002.55 : 52,443.50 = 21,006.81 : x
2. Step 2: Convert to fraction form
   38,002.55/52,443.50 = 21,006.81/x
3. Step 3: Cross multiply
   38,002.55x = 52,443.50 × 21,006.81
4. Step 4: Simplify right side
   38,002.55x = 1,101,670,535.20
5. Step 5: Solve for x
   x = 1,101,670,535.20/38,002.55
6. Step 6: Final answer
   x = 28,989.39