Finding the Fourth Proportional to 12,415.55, 17,134.43 and 7,112.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,415.55 : 17,134.43 = 7,112.07 : x
2. Step 2: Convert to fraction form
   12,415.55/17,134.43 = 7,112.07/x
3. Step 3: Cross multiply
   12,415.55x = 17,134.43 × 7,112.07
4. Step 4: Simplify right side
   12,415.55x = 121,861,230.01
5. Step 5: Solve for x
   x = 121,861,230.01/12,415.55
6. Step 6: Final answer
   x = 9,815.21