Finding the Third Proportional to 309,590 and 632,299.50

Step by Step Solution

1. Step 1: Write the proportion equation
   309,590 : 632,299.50 = 632,299.50 : x
2. Step 2: Convert to fraction form
   309,590/632,299.50 = 632,299.50/x
3. Step 3: Cross multiply
   309,590x = 632,299.50 × 632,299.50
4. Step 4: Simplify right side
   309,590x = 399,802,657,700.25
5. Step 5: Solve for x
   x = 399,802,657,700.25/309,590
6. Step 6: Final answer
   x = 1,291,393.97