Finding the Third Proportional to 208,863 and 428,792.50

Step by Step Solution

1. Step 1: Write the proportion equation
   208,863 : 428,792.50 = 428,792.50 : x
2. Step 2: Convert to fraction form
   208,863/428,792.50 = 428,792.50/x
3. Step 3: Cross multiply
   208,863x = 428,792.50 × 428,792.50
4. Step 4: Simplify right side
   208,863x = 183,863,008,056.25
5. Step 5: Solve for x
   x = 183,863,008,056.25/208,863
6. Step 6: Final answer
   x = 880,304.35