Finding the Fourth Proportional to 1,948.29, 2,687.06 and 1,388.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.29 : 2,687.06 = 1,388.31 : x
2. Step 2: Convert to fraction form
   1,948.29/2,687.06 = 1,388.31/x
3. Step 3: Cross multiply
   1,948.29x = 2,687.06 × 1,388.31
4. Step 4: Simplify right side
   1,948.29x = 3,730,465.33
5. Step 5: Solve for x
   x = 3,730,465.33/1,948.29
6. Step 6: Final answer
   x = 1,914.74