Finding the Fourth Proportional to 1,047.94, 1,449.30 and 916.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.94 : 1,449.30 = 916.72 : x
2. Step 2: Convert to fraction form
   1,047.94/1,449.30 = 916.72/x
3. Step 3: Cross multiply
   1,047.94x = 1,449.30 × 916.72
4. Step 4: Simplify right side
   1,047.94x = 1,328,602.30
5. Step 5: Solve for x
   x = 1,328,602.30/1,047.94
6. Step 6: Final answer
   x = 1,267.82