Finding the Third Proportional to 311,869.50 and 482,709

Step by Step Solution

1. Step 1: Write the proportion equation
   311,869.50 : 482,709 = 482,709 : x
2. Step 2: Convert to fraction form
   311,869.50/482,709 = 482,709/x
3. Step 3: Cross multiply
   311,869.50x = 482,709 × 482,709
4. Step 4: Simplify right side
   311,869.50x = 233,007,978,681
5. Step 5: Solve for x
   x = 233,007,978,681/311,869.50
6. Step 6: Final answer
   x = 747,132.95