Finding the Fourth Proportional to 12,454.74, 17,186.76 and 7,145.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,454.74 : 17,186.76 = 7,145.82 : x
2. Step 2: Convert to fraction form
   12,454.74/17,186.76 = 7,145.82/x
3. Step 3: Cross multiply
   12,454.74x = 17,186.76 × 7,145.82
4. Step 4: Simplify right side
   12,454.74x = 122,813,493.34
5. Step 5: Solve for x
   x = 122,813,493.34/12,454.74
6. Step 6: Final answer
   x = 9,860.78