Finding the Third Proportional to 245,321 and 365,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   245,321 : 365,389.50 = 365,389.50 : x
2. Step 2: Convert to fraction form
   245,321/365,389.50 = 365,389.50/x
3. Step 3: Cross multiply
   245,321x = 365,389.50 × 365,389.50
4. Step 4: Simplify right side
   245,321x = 133,509,486,710.25
5. Step 5: Solve for x
   x = 133,509,486,710.25/245,321
6. Step 6: Final answer
   x = 544,223.64