Finding the Fourth Proportional to 12,390.22, 17,097.69 and 7,354.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390.22 : 17,097.69 = 7,354.18 : x
2. Step 2: Convert to fraction form
   12,390.22/17,097.69 = 7,354.18/x
3. Step 3: Cross multiply
   12,390.22x = 17,097.69 × 7,354.18
4. Step 4: Simplify right side
   12,390.22x = 125,739,489.84
5. Step 5: Solve for x
   x = 125,739,489.84/12,390.22
6. Step 6: Final answer
   x = 10,148.29