Finding the Fourth Proportional to 38,411.50, 53,007.87 and 20,747.50

Step by Step Solution

1. Step 1: Write the proportion equation
   38,411.50 : 53,007.87 = 20,747.50 : x
2. Step 2: Convert to fraction form
   38,411.50/53,007.87 = 20,747.50/x
3. Step 3: Cross multiply
   38,411.50x = 53,007.87 × 20,747.50
4. Step 4: Simplify right side
   38,411.50x = 1,099,780,782.83
5. Step 5: Solve for x
   x = 1,099,780,782.83/38,411.50
6. Step 6: Final answer
   x = 28,631.55