Finding the Fourth Proportional to 2,615.79, 3,921.71 and 1,300.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.79 : 3,921.71 = 1,300.08 : x
2. Step 2: Convert to fraction form
   2,615.79/3,921.71 = 1,300.08/x
3. Step 3: Cross multiply
   2,615.79x = 3,921.71 × 1,300.08
4. Step 4: Simplify right side
   2,615.79x = 5,098,530.24
5. Step 5: Solve for x
   x = 5,098,530.24/2,615.79
6. Step 6: Final answer
   x = 1,949.14