Finding the Fourth Proportional to 1,360.75, 1,876.78 and 912.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.75 : 1,876.78 = 912.47 : x
2. Step 2: Convert to fraction form
   1,360.75/1,876.78 = 912.47/x
3. Step 3: Cross multiply
   1,360.75x = 1,876.78 × 912.47
4. Step 4: Simplify right side
   1,360.75x = 1,712,500.88
5. Step 5: Solve for x
   x = 1,712,500.88/1,360.75
6. Step 6: Final answer
   x = 1,258.50