Finding the Fourth Proportional to 1,128.60, 1,695.33 and 955.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.60 : 1,695.33 = 955.61 : x
2. Step 2: Convert to fraction form
   1,128.60/1,695.33 = 955.61/x
3. Step 3: Cross multiply
   1,128.60x = 1,695.33 × 955.61
4. Step 4: Simplify right side
   1,128.60x = 1,620,065.82
5. Step 5: Solve for x
   x = 1,620,065.82/1,128.60
6. Step 6: Final answer
   x = 1,435.47