Finding the Fourth Proportional to 2,620.18, 3,929.04 and 975.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.18 : 3,929.04 = 975.60 : x
2. Step 2: Convert to fraction form
   2,620.18/3,929.04 = 975.60/x
3. Step 3: Cross multiply
   2,620.18x = 3,929.04 × 975.60
4. Step 4: Simplify right side
   2,620.18x = 3,833,171.42
5. Step 5: Solve for x
   x = 3,833,171.42/2,620.18
6. Step 6: Final answer
   x = 1,462.94