Finding the Fourth Proportional to 1,388.00, 1,915.18 and 798.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.00 : 1,915.18 = 798.39 : x
2. Step 2: Convert to fraction form
   1,388.00/1,915.18 = 798.39/x
3. Step 3: Cross multiply
   1,388.00x = 1,915.18 × 798.39
4. Step 4: Simplify right side
   1,388.00x = 1,529,058.56
5. Step 5: Solve for x
   x = 1,529,058.56/1,388.00
6. Step 6: Final answer
   x = 1,101.63