Finding the Fourth Proportional to 22,558.50, 31,130.73 and 12,622.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,558.50 : 31,130.73 = 12,622.50 : x
2. Step 2: Convert to fraction form
   22,558.50/31,130.73 = 12,622.50/x
3. Step 3: Cross multiply
   22,558.50x = 31,130.73 × 12,622.50
4. Step 4: Simplify right side
   22,558.50x = 392,947,639.43
5. Step 5: Solve for x
   x = 392,947,639.43/22,558.50
6. Step 6: Final answer
   x = 17,419.05