Finding the Fourth Proportional to 22,690.16, 31,311.82 and 12,618.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,690.16 : 31,311.82 = 12,618.08 : x
2. Step 2: Convert to fraction form
   22,690.16/31,311.82 = 12,618.08/x
3. Step 3: Cross multiply
   22,690.16x = 31,311.82 × 12,618.08
4. Step 4: Simplify right side
   22,690.16x = 395,095,049.71
5. Step 5: Solve for x
   x = 395,095,049.71/22,690.16
6. Step 6: Final answer
   x = 17,412.62