Finding the Third Proportional to 155,428.50 and 307,218

Step by Step Solution

1. Step 1: Write the proportion equation
   155,428.50 : 307,218 = 307,218 : x
2. Step 2: Convert to fraction form
   155,428.50/307,218 = 307,218/x
3. Step 3: Cross multiply
   155,428.50x = 307,218 × 307,218
4. Step 4: Simplify right side
   155,428.50x = 94,382,899,524
5. Step 5: Solve for x
   x = 94,382,899,524/155,428.50
6. Step 6: Final answer
   x = 607,243.20