Finding the Third Proportional to 99,856.50 and 217,344

Step by Step Solution

1. Step 1: Write the proportion equation
   99,856.50 : 217,344 = 217,344 : x
2. Step 2: Convert to fraction form
   99,856.50/217,344 = 217,344/x
3. Step 3: Cross multiply
   99,856.50x = 217,344 × 217,344
4. Step 4: Simplify right side
   99,856.50x = 47,238,414,336
5. Step 5: Solve for x
   x = 47,238,414,336/99,856.50
6. Step 6: Final answer
   x = 473,062.99