Finding the Fourth Proportional to 1,389.14, 1,916.61 and 799.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.14 : 1,916.61 = 799.46 : x
2. Step 2: Convert to fraction form
   1,389.14/1,916.61 = 799.46/x
3. Step 3: Cross multiply
   1,389.14x = 1,916.61 × 799.46
4. Step 4: Simplify right side
   1,389.14x = 1,532,253.03
5. Step 5: Solve for x
   x = 1,532,253.03/1,389.14
6. Step 6: Final answer
   x = 1,103.02