Finding the Third Proportional to 272,664 and 636,826.50

Step by Step Solution

1. Step 1: Write the proportion equation
   272,664 : 636,826.50 = 636,826.50 : x
2. Step 2: Convert to fraction form
   272,664/636,826.50 = 636,826.50/x
3. Step 3: Cross multiply
   272,664x = 636,826.50 × 636,826.50
4. Step 4: Simplify right side
   272,664x = 405,547,991,102.25
5. Step 5: Solve for x
   x = 405,547,991,102.25/272,664
6. Step 6: Final answer
   x = 1,487,354.37