Finding the Fourth Proportional to 1,316.50, 1,816.69 and 756.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,316.50 : 1,816.69 = 756.91 : x
2. Step 2: Convert to fraction form
   1,316.50/1,816.69 = 756.91/x
3. Step 3: Cross multiply
   1,316.50x = 1,816.69 × 756.91
4. Step 4: Simplify right side
   1,316.50x = 1,375,070.83
5. Step 5: Solve for x
   x = 1,375,070.83/1,316.50
6. Step 6: Final answer
   x = 1,044.49