Finding the Fourth Proportional to 12,458, 17,192.04 and 7,490

Step by Step Solution

1. Step 1: Write the proportion equation
   12,458 : 17,192.04 = 7,490 : x
2. Step 2: Convert to fraction form
   12,458/17,192.04 = 7,490/x
3. Step 3: Cross multiply
   12,458x = 17,192.04 × 7,490
4. Step 4: Simplify right side
   12,458x = 128,768,379.60
5. Step 5: Solve for x
   x = 128,768,379.60/12,458
6. Step 6: Final answer
   x = 10,336.20