Finding the Fourth Proportional to 21,041.48, 31,567.72 and 7,894.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,041.48 : 31,567.72 = 7,894.10 : x
2. Step 2: Convert to fraction form
   21,041.48/31,567.72 = 7,894.10/x
3. Step 3: Cross multiply
   21,041.48x = 31,567.72 × 7,894.10
4. Step 4: Simplify right side
   21,041.48x = 249,198,738.45
5. Step 5: Solve for x
   x = 249,198,738.45/21,041.48
6. Step 6: Final answer
   x = 11,843.21