Finding the Fourth Proportional to 17,426.31, 26,156.62 and 12,434.18

Step by Step Solution

1. Step 1: Write the proportion equation
   17,426.31 : 26,156.62 = 12,434.18 : x
2. Step 2: Convert to fraction form
   17,426.31/26,156.62 = 12,434.18/x
3. Step 3: Cross multiply
   17,426.31x = 26,156.62 × 12,434.18
4. Step 4: Simplify right side
   17,426.31x = 325,236,006.03
5. Step 5: Solve for x
   x = 325,236,006.03/17,426.31
6. Step 6: Final answer
   x = 18,663.51