Finding the Fourth Proportional to 1,989.60, 2,744.52 and 1,233.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.60 : 2,744.52 = 1,233.72 : x
2. Step 2: Convert to fraction form
   1,989.60/2,744.52 = 1,233.72/x
3. Step 3: Cross multiply
   1,989.60x = 2,744.52 × 1,233.72
4. Step 4: Simplify right side
   1,989.60x = 3,385,969.21
5. Step 5: Solve for x
   x = 3,385,969.21/1,989.60
6. Step 6: Final answer
   x = 1,701.83