Finding the Fourth Proportional to 1,445.73, 2,169.27 and 860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.73 : 2,169.27 = 860.72 : x
2. Step 2: Convert to fraction form
   1,445.73/2,169.27 = 860.72/x
3. Step 3: Cross multiply
   1,445.73x = 2,169.27 × 860.72
4. Step 4: Simplify right side
   1,445.73x = 1,867,123.23
5. Step 5: Solve for x
   x = 1,867,123.23/1,445.73
6. Step 6: Final answer
   x = 1,291.47