Finding the Third Proportional to 117,072 and 248,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,072 : 248,728.50 = 248,728.50 : x
2. Step 2: Convert to fraction form
   117,072/248,728.50 = 248,728.50/x
3. Step 3: Cross multiply
   117,072x = 248,728.50 × 248,728.50
4. Step 4: Simplify right side
   117,072x = 61,865,866,712.25
5. Step 5: Solve for x
   x = 61,865,866,712.25/117,072
6. Step 6: Final answer
   x = 528,442.90