Finding the Third Proportional to 306,040.50 and 459,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,040.50 : 459,061.50 = 459,061.50 : x
2. Step 2: Convert to fraction form
   306,040.50/459,061.50 = 459,061.50/x
3. Step 3: Cross multiply
   306,040.50x = 459,061.50 × 459,061.50
4. Step 4: Simplify right side
   306,040.50x = 210,737,460,782.25
5. Step 5: Solve for x
   x = 210,737,460,782.25/306,040.50
6. Step 6: Final answer
   x = 688,593.38