Finding the Fourth Proportional to 1,156.80, 1,596.96 and 876.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.80 : 1,596.96 = 876.72 : x
2. Step 2: Convert to fraction form
   1,156.80/1,596.96 = 876.72/x
3. Step 3: Cross multiply
   1,156.80x = 1,596.96 × 876.72
4. Step 4: Simplify right side
   1,156.80x = 1,400,086.77
5. Step 5: Solve for x
   x = 1,400,086.77/1,156.80
6. Step 6: Final answer
   x = 1,210.31