Finding the Fourth Proportional to 16,402.53, 22,646.18 and 12,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,402.53 : 22,646.18 = 12,618.72 : x
2. Step 2: Convert to fraction form
   16,402.53/22,646.18 = 12,618.72/x
3. Step 3: Cross multiply
   16,402.53x = 22,646.18 × 12,618.72
4. Step 4: Simplify right side
   16,402.53x = 285,765,628.17
5. Step 5: Solve for x
   x = 285,765,628.17/16,402.53
6. Step 6: Final answer
   x = 17,422.05