Finding the Fourth Proportional to 1,388.03, 1,915.52 and 798.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.03 : 1,915.52 = 798.62 : x
2. Step 2: Convert to fraction form
   1,388.03/1,915.52 = 798.62/x
3. Step 3: Cross multiply
   1,388.03x = 1,915.52 × 798.62
4. Step 4: Simplify right side
   1,388.03x = 1,529,759.01
5. Step 5: Solve for x
   x = 1,529,759.01/1,388.03
6. Step 6: Final answer
   x = 1,102.11