Finding the Fourth Proportional to 1,742.50, 2,401.91 and 1,321.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,742.50 : 2,401.91 = 1,321.16 : x
2. Step 2: Convert to fraction form
   1,742.50/2,401.91 = 1,321.16/x
3. Step 3: Cross multiply
   1,742.50x = 2,401.91 × 1,321.16
4. Step 4: Simplify right side
   1,742.50x = 3,173,307.42
5. Step 5: Solve for x
   x = 3,173,307.42/1,742.50
6. Step 6: Final answer
   x = 1,821.12