Finding the Fourth Proportional to 1,388.91, 2,084.27 and 740.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.91 : 2,084.27 = 740.10 : x
2. Step 2: Convert to fraction form
   1,388.91/2,084.27 = 740.10/x
3. Step 3: Cross multiply
   1,388.91x = 2,084.27 × 740.10
4. Step 4: Simplify right side
   1,388.91x = 1,542,568.23
5. Step 5: Solve for x
   x = 1,542,568.23/1,388.91
6. Step 6: Final answer
   x = 1,110.63