Finding the Fourth Proportional to 1,153.34, 1,726.76 and 878.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.34 : 1,726.76 = 878.30 : x
2. Step 2: Convert to fraction form
   1,153.34/1,726.76 = 878.30/x
3. Step 3: Cross multiply
   1,153.34x = 1,726.76 × 878.30
4. Step 4: Simplify right side
   1,153.34x = 1,516,613.31
5. Step 5: Solve for x
   x = 1,516,613.31/1,153.34
6. Step 6: Final answer
   x = 1,314.98