Finding the Fourth Proportional to 9,170.29, 12,655.07 and 4,978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,170.29 : 12,655.07 = 4,978.54 : x
2. Step 2: Convert to fraction form
   9,170.29/12,655.07 = 4,978.54/x
3. Step 3: Cross multiply
   9,170.29x = 12,655.07 × 4,978.54
4. Step 4: Simplify right side
   9,170.29x = 63,003,772.20
5. Step 5: Solve for x
   x = 63,003,772.20/9,170.29
6. Step 6: Final answer
   x = 6,870.42