Finding the Third Proportional to 206,620.88 and 438,048

Step by Step Solution

1. Step 1: Write the proportion equation
   206,620.88 : 438,048 = 438,048 : x
2. Step 2: Convert to fraction form
   206,620.88/438,048 = 438,048/x
3. Step 3: Cross multiply
   206,620.88x = 438,048 × 438,048
4. Step 4: Simplify right side
   206,620.88x = 191,886,050,304
5. Step 5: Solve for x
   x = 191,886,050,304/206,620.88
6. Step 6: Final answer
   x = 928,686.66