Finding the Third Proportional to 161,783 and 248,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,783 : 248,308.50 = 248,308.50 : x
2. Step 2: Convert to fraction form
   161,783/248,308.50 = 248,308.50/x
3. Step 3: Cross multiply
   161,783x = 248,308.50 × 248,308.50
4. Step 4: Simplify right side
   161,783x = 61,657,111,172.25
5. Step 5: Solve for x
   x = 61,657,111,172.25/161,783
6. Step 6: Final answer
   x = 381,109.95