Finding the Fourth Proportional to 22,861.28, 31,560.06 and 21,640.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,861.28 : 31,560.06 = 21,640.34 : x
2. Step 2: Convert to fraction form
   22,861.28/31,560.06 = 21,640.34/x
3. Step 3: Cross multiply
   22,861.28x = 31,560.06 × 21,640.34
4. Step 4: Simplify right side
   22,861.28x = 682,970,428.82
5. Step 5: Solve for x
   x = 682,970,428.82/22,861.28
6. Step 6: Final answer
   x = 29,874.55