Finding the Third Proportional to 269,898 and 388,807.50

Step by Step Solution

1. Step 1: Write the proportion equation
   269,898 : 388,807.50 = 388,807.50 : x
2. Step 2: Convert to fraction form
   269,898/388,807.50 = 388,807.50/x
3. Step 3: Cross multiply
   269,898x = 388,807.50 × 388,807.50
4. Step 4: Simplify right side
   269,898x = 151,171,272,056.25
5. Step 5: Solve for x
   x = 151,171,272,056.25/269,898
6. Step 6: Final answer
   x = 560,105.20