Finding the Fourth Proportional to 2,616.16, 3,921 and 1,298.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.16 : 3,921 = 1,298.50 : x
2. Step 2: Convert to fraction form
   2,616.16/3,921 = 1,298.50/x
3. Step 3: Cross multiply
   2,616.16x = 3,921 × 1,298.50
4. Step 4: Simplify right side
   2,616.16x = 5,091,418.50
5. Step 5: Solve for x
   x = 5,091,418.50/2,616.16
6. Step 6: Final answer
   x = 1,946.14