Finding the Fourth Proportional to 1,492.80, 2,233.72 and 876.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.80 : 2,233.72 = 876.79 : x
2. Step 2: Convert to fraction form
   1,492.80/2,233.72 = 876.79/x
3. Step 3: Cross multiply
   1,492.80x = 2,233.72 × 876.79
4. Step 4: Simplify right side
   1,492.80x = 1,958,503.36
5. Step 5: Solve for x
   x = 1,958,503.36/1,492.80
6. Step 6: Final answer
   x = 1,311.97