Finding the Third Proportional to 392,316 and 831,710.75

Step by Step Solution

1. Step 1: Write the proportion equation
   392,316 : 831,710.75 = 831,710.75 : x
2. Step 2: Convert to fraction form
   392,316/831,710.75 = 831,710.75/x
3. Step 3: Cross multiply
   392,316x = 831,710.75 × 831,710.75
4. Step 4: Simplify right side
   392,316x = 691,742,771,665.56
5. Step 5: Solve for x
   x = 691,742,771,665.56/392,316
6. Step 6: Final answer
   x = 1,763,228.55