Finding the Third Proportional to 554,778 and 708,905.25

Step by Step Solution

1. Step 1: Write the proportion equation
   554,778 : 708,905.25 = 708,905.25 : x
2. Step 2: Convert to fraction form
   554,778/708,905.25 = 708,905.25/x
3. Step 3: Cross multiply
   554,778x = 708,905.25 × 708,905.25
4. Step 4: Simplify right side
   554,778x = 502,546,653,477.56
5. Step 5: Solve for x
   x = 502,546,653,477.56/554,778
6. Step 6: Final answer
   x = 905,851.81