Finding the Third Proportional to 406,428 and 632,902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,428 : 632,902.50 = 632,902.50 : x
2. Step 2: Convert to fraction form
   406,428/632,902.50 = 632,902.50/x
3. Step 3: Cross multiply
   406,428x = 632,902.50 × 632,902.50
4. Step 4: Simplify right side
   406,428x = 400,565,574,506.25
5. Step 5: Solve for x
   x = 400,565,574,506.25/406,428
6. Step 6: Final answer
   x = 985,575.73