Finding the Fourth Proportional to 12,457.89, 17,188.86 and 7,418.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,457.89 : 17,188.86 = 7,418.88 : x
2. Step 2: Convert to fraction form
   12,457.89/17,188.86 = 7,418.88/x
3. Step 3: Cross multiply
   12,457.89x = 17,188.86 × 7,418.88
4. Step 4: Simplify right side
   12,457.89x = 127,522,089.68
5. Step 5: Solve for x
   x = 127,522,089.68/12,457.89
6. Step 6: Final answer
   x = 10,236.25