Finding the Fourth Proportional to 1,398.53, 2,114.34 and 1,387.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.53 : 2,114.34 = 1,387.01 : x
2. Step 2: Convert to fraction form
   1,398.53/2,114.34 = 1,387.01/x
3. Step 3: Cross multiply
   1,398.53x = 2,114.34 × 1,387.01
4. Step 4: Simplify right side
   1,398.53x = 2,932,600.15
5. Step 5: Solve for x
   x = 2,932,600.15/1,398.53
6. Step 6: Final answer
   x = 2,096.92