Finding the Fourth Proportional to 2,624.10, 3,935.64 and 980.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.10 : 3,935.64 = 980.74 : x
2. Step 2: Convert to fraction form
   2,624.10/3,935.64 = 980.74/x
3. Step 3: Cross multiply
   2,624.10x = 3,935.64 × 980.74
4. Step 4: Simplify right side
   2,624.10x = 3,859,839.57
5. Step 5: Solve for x
   x = 3,859,839.57/2,624.10
6. Step 6: Final answer
   x = 1,470.92