Finding the Third Proportional to 272,308.50 and 412,155

Step by Step Solution

1. Step 1: Write the proportion equation
   272,308.50 : 412,155 = 412,155 : x
2. Step 2: Convert to fraction form
   272,308.50/412,155 = 412,155/x
3. Step 3: Cross multiply
   272,308.50x = 412,155 × 412,155
4. Step 4: Simplify right side
   272,308.50x = 169,871,744,025
5. Step 5: Solve for x
   x = 169,871,744,025/272,308.50
6. Step 6: Final answer
   x = 623,820.94