Finding the Third Proportional to 287,776.50 and 632,658

Step by Step Solution

1. Step 1: Write the proportion equation
   287,776.50 : 632,658 = 632,658 : x
2. Step 2: Convert to fraction form
   287,776.50/632,658 = 632,658/x
3. Step 3: Cross multiply
   287,776.50x = 632,658 × 632,658
4. Step 4: Simplify right side
   287,776.50x = 400,256,144,964
5. Step 5: Solve for x
   x = 400,256,144,964/287,776.50
6. Step 6: Final answer
   x = 1,390,857.64