Finding the Fourth Proportional to 38,715, 53,423.82 and 21,947.64

Step by Step Solution

1. Step 1: Write the proportion equation
   38,715 : 53,423.82 = 21,947.64 : x
2. Step 2: Convert to fraction form
   38,715/53,423.82 = 21,947.64/x
3. Step 3: Cross multiply
   38,715x = 53,423.82 × 21,947.64
4. Step 4: Simplify right side
   38,715x = 1,172,526,768.78
5. Step 5: Solve for x
   x = 1,172,526,768.78/38,715
6. Step 6: Final answer
   x = 30,286.11