Finding the Fourth Proportional to 21,041.56, 31,565.34 and 9,791.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,041.56 : 31,565.34 = 9,791.48 : x
2. Step 2: Convert to fraction form
   21,041.56/31,565.34 = 9,791.48/x
3. Step 3: Cross multiply
   21,041.56x = 31,565.34 × 9,791.48
4. Step 4: Simplify right side
   21,041.56x = 309,071,395.30
5. Step 5: Solve for x
   x = 309,071,395.30/21,041.56
6. Step 6: Final answer
   x = 14,688.62