Finding the Third Proportional to 221,400 and 458,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,400 : 458,554.50 = 458,554.50 : x
2. Step 2: Convert to fraction form
   221,400/458,554.50 = 458,554.50/x
3. Step 3: Cross multiply
   221,400x = 458,554.50 × 458,554.50
4. Step 4: Simplify right side
   221,400x = 210,272,229,470.25
5. Step 5: Solve for x
   x = 210,272,229,470.25/221,400
6. Step 6: Final answer
   x = 949,739.07