Finding the Fourth Proportional to 39,902.14, 55,063.27 and 21,752.47

Step by Step Solution

1. Step 1: Write the proportion equation
   39,902.14 : 55,063.27 = 21,752.47 : x
2. Step 2: Convert to fraction form
   39,902.14/55,063.27 = 21,752.47/x
3. Step 3: Cross multiply
   39,902.14x = 55,063.27 × 21,752.47
4. Step 4: Simplify right side
   39,902.14x = 1,197,762,128.78
5. Step 5: Solve for x
   x = 1,197,762,128.78/39,902.14
6. Step 6: Final answer
   x = 30,017.49