Finding the Fourth Proportional to 2,600.36, 3,900.48 and 1,300.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.36 : 3,900.48 = 1,300.88 : x
2. Step 2: Convert to fraction form
   2,600.36/3,900.48 = 1,300.88/x
3. Step 3: Cross multiply
   2,600.36x = 3,900.48 × 1,300.88
4. Step 4: Simplify right side
   2,600.36x = 5,074,056.42
5. Step 5: Solve for x
   x = 5,074,056.42/2,600.36
6. Step 6: Final answer
   x = 1,951.29