Finding the Third Proportional to 272,699 and 636,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   272,699 : 636,911.50 = 636,911.50 : x
2. Step 2: Convert to fraction form
   272,699/636,911.50 = 636,911.50/x
3. Step 3: Cross multiply
   272,699x = 636,911.50 × 636,911.50
4. Step 4: Simplify right side
   272,699x = 405,656,258,832.25
5. Step 5: Solve for x
   x = 405,656,258,832.25/272,699
6. Step 6: Final answer
   x = 1,487,560.49