Finding the Fourth Proportional to 798.53, 1,106.71 and 786.69

Step by Step Solution

1. Step 1: Write the proportion equation
   798.53 : 1,106.71 = 786.69 : x
2. Step 2: Convert to fraction form
   798.53/1,106.71 = 786.69/x
3. Step 3: Cross multiply
   798.53x = 1,106.71 × 786.69
4. Step 4: Simplify right side
   798.53x = 870,635.72
5. Step 5: Solve for x
   x = 870,635.72/798.53
6. Step 6: Final answer
   x = 1,090.30