Finding the Fourth Proportional to 22,488.64, 31,038.06 and 21,492.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,488.64 : 31,038.06 = 21,492.16 : x
2. Step 2: Convert to fraction form
   22,488.64/31,038.06 = 21,492.16/x
3. Step 3: Cross multiply
   22,488.64x = 31,038.06 × 21,492.16
4. Step 4: Simplify right side
   22,488.64x = 667,074,951.61
5. Step 5: Solve for x
   x = 667,074,951.61/22,488.64
6. Step 6: Final answer
   x = 29,662.75