Finding the Third Proportional to 296,499 and 638,026.50

Step by Step Solution

1. Step 1: Write the proportion equation
   296,499 : 638,026.50 = 638,026.50 : x
2. Step 2: Convert to fraction form
   296,499/638,026.50 = 638,026.50/x
3. Step 3: Cross multiply
   296,499x = 638,026.50 × 638,026.50
4. Step 4: Simplify right side
   296,499x = 407,077,814,702.25
5. Step 5: Solve for x
   x = 407,077,814,702.25/296,499
6. Step 6: Final answer
   x = 1,372,948.36