Finding the Fourth Proportional to 23,018.84, 31,689.20 and 21,960.88

Step by Step Solution

1. Step 1: Write the proportion equation
   23,018.84 : 31,689.20 = 21,960.88 : x
2. Step 2: Convert to fraction form
   23,018.84/31,689.20 = 21,960.88/x
3. Step 3: Cross multiply
   23,018.84x = 31,689.20 × 21,960.88
4. Step 4: Simplify right side
   23,018.84x = 695,922,718.50
5. Step 5: Solve for x
   x = 695,922,718.50/23,018.84
6. Step 6: Final answer
   x = 30,232.74