Finding the Third Proportional to 143,077.75 and 221,442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,077.75 : 221,442.50 = 221,442.50 : x
2. Step 2: Convert to fraction form
   143,077.75/221,442.50 = 221,442.50/x
3. Step 3: Cross multiply
   143,077.75x = 221,442.50 × 221,442.50
4. Step 4: Simplify right side
   143,077.75x = 49,036,780,806.25
5. Step 5: Solve for x
   x = 49,036,780,806.25/143,077.75
6. Step 6: Final answer
   x = 342,728.21