Finding the Fourth Proportional to 21,047.38, 31,562.82 and 7,892.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,047.38 : 31,562.82 = 7,892.58 : x
2. Step 2: Convert to fraction form
   21,047.38/31,562.82 = 7,892.58/x
3. Step 3: Cross multiply
   21,047.38x = 31,562.82 × 7,892.58
4. Step 4: Simplify right side
   21,047.38x = 249,112,081.88
5. Step 5: Solve for x
   x = 249,112,081.88/21,047.38
6. Step 6: Final answer
   x = 11,835.78