Finding the Fourth Proportional to 12,415.30, 17,134.08 and 7,111.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,415.30 : 17,134.08 = 7,111.82 : x
2. Step 2: Convert to fraction form
   12,415.30/17,134.08 = 7,111.82/x
3. Step 3: Cross multiply
   12,415.30x = 17,134.08 × 7,111.82
4. Step 4: Simplify right side
   12,415.30x = 121,854,492.83
5. Step 5: Solve for x
   x = 121,854,492.83/12,415.30
6. Step 6: Final answer
   x = 9,814.86