Finding the Third Proportional to 216,112 and 317,156.25

Step by Step Solution

1. Step 1: Write the proportion equation
   216,112 : 317,156.25 = 317,156.25 : x
2. Step 2: Convert to fraction form
   216,112/317,156.25 = 317,156.25/x
3. Step 3: Cross multiply
   216,112x = 317,156.25 × 317,156.25
4. Step 4: Simplify right side
   216,112x = 100,588,086,914.06
5. Step 5: Solve for x
   x = 100,588,086,914.06/216,112
6. Step 6: Final answer
   x = 465,444.25