Finding the Third Proportional to 143,455 and 221,354.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,455 : 221,354.50 = 221,354.50 : x
2. Step 2: Convert to fraction form
   143,455/221,354.50 = 221,354.50/x
3. Step 3: Cross multiply
   143,455x = 221,354.50 × 221,354.50
4. Step 4: Simplify right side
   143,455x = 48,997,814,670.25
5. Step 5: Solve for x
   x = 48,997,814,670.25/143,455
6. Step 6: Final answer
   x = 341,555.29