Finding the Fourth Proportional to 4,978.60, 7,484.10 and 4,265.80

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.60 : 7,484.10 = 4,265.80 : x
2. Step 2: Convert to fraction form
   4,978.60/7,484.10 = 4,265.80/x
3. Step 3: Cross multiply
   4,978.60x = 7,484.10 × 4,265.80
4. Step 4: Simplify right side
   4,978.60x = 31,925,673.78
5. Step 5: Solve for x
   x = 31,925,673.78/4,978.60
6. Step 6: Final answer
   x = 6,412.58