Finding the Fourth Proportional to 994.72, 1,492.80 and 850.72

Step by Step Solution

1. Step 1: Write the proportion equation
   994.72 : 1,492.80 = 850.72 : x
2. Step 2: Convert to fraction form
   994.72/1,492.80 = 850.72/x
3. Step 3: Cross multiply
   994.72x = 1,492.80 × 850.72
4. Step 4: Simplify right side
   994.72x = 1,269,954.82
5. Step 5: Solve for x
   x = 1,269,954.82/994.72
6. Step 6: Final answer
   x = 1,276.70