Finding the Third Proportional to 1,238.63 and 1,888.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.63 : 1,888.31 = 1,888.31 : x
2. Step 2: Convert to fraction form
   1,238.63/1,888.31 = 1,888.31/x
3. Step 3: Cross multiply
   1,238.63x = 1,888.31 × 1,888.31
4. Step 4: Simplify right side
   1,238.63x = 3,565,724.10
5. Step 5: Solve for x
   x = 3,565,724.10/1,238.63
6. Step 6: Final answer
   x = 2,878.78