Finding the Fourth Proportional to 12,426, 17,147.88 and 7,458

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426 : 17,147.88 = 7,458 : x
2. Step 2: Convert to fraction form
   12,426/17,147.88 = 7,458/x
3. Step 3: Cross multiply
   12,426x = 17,147.88 × 7,458
4. Step 4: Simplify right side
   12,426x = 127,888,889.04
5. Step 5: Solve for x
   x = 127,888,889.04/12,426
6. Step 6: Final answer
   x = 10,292.04