Finding the Fourth Proportional to 2,613.74, 3,921.25 and 1,298.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.74 : 3,921.25 = 1,298.11 : x
2. Step 2: Convert to fraction form
   2,613.74/3,921.25 = 1,298.11/x
3. Step 3: Cross multiply
   2,613.74x = 3,921.25 × 1,298.11
4. Step 4: Simplify right side
   2,613.74x = 5,090,194.23
5. Step 5: Solve for x
   x = 5,090,194.23/2,613.74
6. Step 6: Final answer
   x = 1,947.48