Finding the Third Proportional to 473,688 and 685,654.88

Step by Step Solution

1. Step 1: Write the proportion equation
   473,688 : 685,654.88 = 685,654.88 : x
2. Step 2: Convert to fraction form
   473,688/685,654.88 = 685,654.88/x
3. Step 3: Cross multiply
   473,688x = 685,654.88 × 685,654.88
4. Step 4: Simplify right side
   473,688x = 470,122,607,611.27
5. Step 5: Solve for x
   x = 470,122,607,611.27/473,688
6. Step 6: Final answer
   x = 992,473.12