Finding the Fourth Proportional to 1,746.67, 2,615.72 and 1,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,746.67 : 2,615.72 = 1,128.50 : x
2. Step 2: Convert to fraction form
   1,746.67/2,615.72 = 1,128.50/x
3. Step 3: Cross multiply
   1,746.67x = 2,615.72 × 1,128.50
4. Step 4: Simplify right side
   1,746.67x = 2,951,821.30
5. Step 5: Solve for x
   x = 2,951,821.30/1,746.67
6. Step 6: Final answer
   x = 1,689.97