Finding the Third Proportional to 392,315 and 831,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,315 : 831,710.50 = 831,710.50 : x
2. Step 2: Convert to fraction form
   392,315/831,710.50 = 831,710.50/x
3. Step 3: Cross multiply
   392,315x = 831,710.50 × 831,710.50
4. Step 4: Simplify right side
   392,315x = 691,742,355,810.25
5. Step 5: Solve for x
   x = 691,742,355,810.25/392,315
6. Step 6: Final answer
   x = 1,763,231.98