Finding the Fourth Proportional to 2,661.58, 3,988.67 and 1,360.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.58 : 3,988.67 = 1,360.30 : x
2. Step 2: Convert to fraction form
   2,661.58/3,988.67 = 1,360.30/x
3. Step 3: Cross multiply
   2,661.58x = 3,988.67 × 1,360.30
4. Step 4: Simplify right side
   2,661.58x = 5,425,787.80
5. Step 5: Solve for x
   x = 5,425,787.80/2,661.58
6. Step 6: Final answer
   x = 2,038.56