Finding the Fourth Proportional to 1,661.96, 2,491.50 and 1,401.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.96 : 2,491.50 = 1,401.32 : x
2. Step 2: Convert to fraction form
   1,661.96/2,491.50 = 1,401.32/x
3. Step 3: Cross multiply
   1,661.96x = 2,491.50 × 1,401.32
4. Step 4: Simplify right side
   1,661.96x = 3,491,388.78
5. Step 5: Solve for x
   x = 3,491,388.78/1,661.96
6. Step 6: Final answer
   x = 2,100.77