Finding the Fourth Proportional to 39,300.86, 54,233.88 and 21,395.54

Step by Step Solution

1. Step 1: Write the proportion equation
   39,300.86 : 54,233.88 = 21,395.54 : x
2. Step 2: Convert to fraction form
   39,300.86/54,233.88 = 21,395.54/x
3. Step 3: Cross multiply
   39,300.86x = 54,233.88 × 21,395.54
4. Step 4: Simplify right side
   39,300.86x = 1,160,363,148.90
5. Step 5: Solve for x
   x = 1,160,363,148.90/39,300.86
6. Step 6: Final answer
   x = 29,525.13