Finding the Fourth Proportional to 1,295.89, 1,789.42 and 877.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,295.89 : 1,789.42 = 877.63 : x
2. Step 2: Convert to fraction form
   1,295.89/1,789.42 = 877.63/x
3. Step 3: Cross multiply
   1,295.89x = 1,789.42 × 877.63
4. Step 4: Simplify right side
   1,295.89x = 1,570,442.01
5. Step 5: Solve for x
   x = 1,570,442.01/1,295.89
6. Step 6: Final answer
   x = 1,211.87