Finding the Fourth Proportional to 1,109.76, 1,661.59 and 799.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.76 : 1,661.59 = 799.93 : x
2. Step 2: Convert to fraction form
   1,109.76/1,661.59 = 799.93/x
3. Step 3: Cross multiply
   1,109.76x = 1,661.59 × 799.93
4. Step 4: Simplify right side
   1,109.76x = 1,329,155.69
5. Step 5: Solve for x
   x = 1,329,155.69/1,109.76
6. Step 6: Final answer
   x = 1,197.70