Finding the Third Proportional to 392,313 and 831,706.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,313 : 831,706.50 = 831,706.50 : x
2. Step 2: Convert to fraction form
   392,313/831,706.50 = 831,706.50/x
3. Step 3: Cross multiply
   392,313x = 831,706.50 × 831,706.50
4. Step 4: Simplify right side
   392,313x = 691,735,702,142.25
5. Step 5: Solve for x
   x = 691,735,702,142.25/392,313
6. Step 6: Final answer
   x = 1,763,224.01