Finding the Third Proportional to 269,820 and 389,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   269,820 : 389,812.50 = 389,812.50 : x
2. Step 2: Convert to fraction form
   269,820/389,812.50 = 389,812.50/x
3. Step 3: Cross multiply
   269,820x = 389,812.50 × 389,812.50
4. Step 4: Simplify right side
   269,820x = 151,953,785,156.25
5. Step 5: Solve for x
   x = 151,953,785,156.25/269,820
6. Step 6: Final answer
   x = 563,167.24