Finding the Third Proportional to 135,084 and 312,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   135,084 : 312,721.50 = 312,721.50 : x
2. Step 2: Convert to fraction form
   135,084/312,721.50 = 312,721.50/x
3. Step 3: Cross multiply
   135,084x = 312,721.50 × 312,721.50
4. Step 4: Simplify right side
   135,084x = 97,794,736,562.25
5. Step 5: Solve for x
   x = 97,794,736,562.25/135,084
6. Step 6: Final answer
   x = 723,955.00