Finding the Third Proportional to 323,131.50 and 690,246

Step by Step Solution

1. Step 1: Write the proportion equation
   323,131.50 : 690,246 = 690,246 : x
2. Step 2: Convert to fraction form
   323,131.50/690,246 = 690,246/x
3. Step 3: Cross multiply
   323,131.50x = 690,246 × 690,246
4. Step 4: Simplify right side
   323,131.50x = 476,439,540,516
5. Step 5: Solve for x
   x = 476,439,540,516/323,131.50
6. Step 6: Final answer
   x = 1,474,444.74