Finding the Third Proportional to 140,218 and 217,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,218 : 217,528.50 = 217,528.50 : x
2. Step 2: Convert to fraction form
   140,218/217,528.50 = 217,528.50/x
3. Step 3: Cross multiply
   140,218x = 217,528.50 × 217,528.50
4. Step 4: Simplify right side
   140,218x = 47,318,648,312.25
5. Step 5: Solve for x
   x = 47,318,648,312.25/140,218
6. Step 6: Final answer
   x = 337,464.86