Finding the Fourth Proportional to 1,365.72, 2,045.73 and 876.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,365.72 : 2,045.73 = 876.30 : x
2. Step 2: Convert to fraction form
   1,365.72/2,045.73 = 876.30/x
3. Step 3: Cross multiply
   1,365.72x = 2,045.73 × 876.30
4. Step 4: Simplify right side
   1,365.72x = 1,792,673.20
5. Step 5: Solve for x
   x = 1,792,673.20/1,365.72
6. Step 6: Final answer
   x = 1,312.62