Finding the Fourth Proportional to 1,389.02, 1,917.01 and 799.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.02 : 1,917.01 = 799.67 : x
2. Step 2: Convert to fraction form
   1,389.02/1,917.01 = 799.67/x
3. Step 3: Cross multiply
   1,389.02x = 1,917.01 × 799.67
4. Step 4: Simplify right side
   1,389.02x = 1,532,974.22
5. Step 5: Solve for x
   x = 1,532,974.22/1,389.02
6. Step 6: Final answer
   x = 1,103.64