Finding the Fourth Proportional to 1,388.84, 1,916.78 and 799.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.84 : 1,916.78 = 799.26 : x
2. Step 2: Convert to fraction form
   1,388.84/1,916.78 = 799.26/x
3. Step 3: Cross multiply
   1,388.84x = 1,916.78 × 799.26
4. Step 4: Simplify right side
   1,388.84x = 1,532,001.59
5. Step 5: Solve for x
   x = 1,532,001.59/1,388.84
6. Step 6: Final answer
   x = 1,103.08