Finding the Third Proportional to 139,427.50 and 221,595

Step by Step Solution

1. Step 1: Write the proportion equation
   139,427.50 : 221,595 = 221,595 : x
2. Step 2: Convert to fraction form
   139,427.50/221,595 = 221,595/x
3. Step 3: Cross multiply
   139,427.50x = 221,595 × 221,595
4. Step 4: Simplify right side
   139,427.50x = 49,104,344,025
5. Step 5: Solve for x
   x = 49,104,344,025/139,427.50
6. Step 6: Final answer
   x = 352,185.50