Finding the Third Proportional to 243,578 and 531,306.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,578 : 531,306.50 = 531,306.50 : x
2. Step 2: Convert to fraction form
   243,578/531,306.50 = 531,306.50/x
3. Step 3: Cross multiply
   243,578x = 531,306.50 × 531,306.50
4. Step 4: Simplify right side
   243,578x = 282,286,596,942.25
5. Step 5: Solve for x
   x = 282,286,596,942.25/243,578
6. Step 6: Final answer
   x = 1,158,916.64