Finding the Third Proportional to 139,725 and 197,518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,725 : 197,518.50 = 197,518.50 : x
2. Step 2: Convert to fraction form
   139,725/197,518.50 = 197,518.50/x
3. Step 3: Cross multiply
   139,725x = 197,518.50 × 197,518.50
4. Step 4: Simplify right side
   139,725x = 39,013,557,842.25
5. Step 5: Solve for x
   x = 39,013,557,842.25/139,725
6. Step 6: Final answer
   x = 279,216.73