Finding the Fourth Proportional to 21,071.54, 31,587.78 and 7,932.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,071.54 : 31,587.78 = 7,932.62 : x
2. Step 2: Convert to fraction form
   21,071.54/31,587.78 = 7,932.62/x
3. Step 3: Cross multiply
   21,071.54x = 31,587.78 × 7,932.62
4. Step 4: Simplify right side
   21,071.54x = 250,573,855.38
5. Step 5: Solve for x
   x = 250,573,855.38/21,071.54
6. Step 6: Final answer
   x = 11,891.58