Finding the Third Proportional to 326,485 and 478,549.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,485 : 478,549.50 = 478,549.50 : x
2. Step 2: Convert to fraction form
   326,485/478,549.50 = 478,549.50/x
3. Step 3: Cross multiply
   326,485x = 478,549.50 × 478,549.50
4. Step 4: Simplify right side
   326,485x = 229,009,623,950.25
5. Step 5: Solve for x
   x = 229,009,623,950.25/326,485
6. Step 6: Final answer
   x = 701,439.96