Finding the Third Proportional to 288,912 and 449,103.75

Step by Step Solution

1. Step 1: Write the proportion equation
   288,912 : 449,103.75 = 449,103.75 : x
2. Step 2: Convert to fraction form
   288,912/449,103.75 = 449,103.75/x
3. Step 3: Cross multiply
   288,912x = 449,103.75 × 449,103.75
4. Step 4: Simplify right side
   288,912x = 201,694,178,264.06
5. Step 5: Solve for x
   x = 201,694,178,264.06/288,912
6. Step 6: Final answer
   x = 698,116.31