Finding the Third Proportional to 455,456 and 680,673.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,456 : 680,673.50 = 680,673.50 : x
2. Step 2: Convert to fraction form
   455,456/680,673.50 = 680,673.50/x
3. Step 3: Cross multiply
   455,456x = 680,673.50 × 680,673.50
4. Step 4: Simplify right side
   455,456x = 463,316,413,602.25
5. Step 5: Solve for x
   x = 463,316,413,602.25/455,456
6. Step 6: Final answer
   x = 1,017,258.34