Finding the Fourth Proportional to 1,642.17, 2,466.90 and 1,401.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.17 : 2,466.90 = 1,401.60 : x
2. Step 2: Convert to fraction form
   1,642.17/2,466.90 = 1,401.60/x
3. Step 3: Cross multiply
   1,642.17x = 2,466.90 × 1,401.60
4. Step 4: Simplify right side
   1,642.17x = 3,457,607.04
5. Step 5: Solve for x
   x = 3,457,607.04/1,642.17
6. Step 6: Final answer
   x = 2,105.51