Finding the Fourth Proportional to 39,935.52, 55,110.76 and 21,787.25

Step by Step Solution

1. Step 1: Write the proportion equation
   39,935.52 : 55,110.76 = 21,787.25 : x
2. Step 2: Convert to fraction form
   39,935.52/55,110.76 = 21,787.25/x
3. Step 3: Cross multiply
   39,935.52x = 55,110.76 × 21,787.25
4. Step 4: Simplify right side
   39,935.52x = 1,200,711,575.79
5. Step 5: Solve for x
   x = 1,200,711,575.79/39,935.52
6. Step 6: Final answer
   x = 30,066.26