Finding the Fourth Proportional to 22,690.17, 31,313.61 and 12,618.81

Step by Step Solution

1. Step 1: Write the proportion equation
   22,690.17 : 31,313.61 = 12,618.81 : x
2. Step 2: Convert to fraction form
   22,690.17/31,313.61 = 12,618.81/x
3. Step 3: Cross multiply
   22,690.17x = 31,313.61 × 12,618.81
4. Step 4: Simplify right side
   22,690.17x = 395,140,495.00
5. Step 5: Solve for x
   x = 395,140,495.00/22,690.17
6. Step 6: Final answer
   x = 17,414.61