Finding the Fourth Proportional to 12,459.35, 17,186.18 and 7,420.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,459.35 : 17,186.18 = 7,420.14 : x
2. Step 2: Convert to fraction form
   12,459.35/17,186.18 = 7,420.14/x
3. Step 3: Cross multiply
   12,459.35x = 17,186.18 × 7,420.14
4. Step 4: Simplify right side
   12,459.35x = 127,523,824.56
5. Step 5: Solve for x
   x = 127,523,824.56/12,459.35
6. Step 6: Final answer
   x = 10,235.19