Finding the Third Proportional to 220,648 and 340,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   220,648 : 340,957.50 = 340,957.50 : x
2. Step 2: Convert to fraction form
   220,648/340,957.50 = 340,957.50/x
3. Step 3: Cross multiply
   220,648x = 340,957.50 × 340,957.50
4. Step 4: Simplify right side
   220,648x = 116,252,016,806.25
5. Step 5: Solve for x
   x = 116,252,016,806.25/220,648
6. Step 6: Final answer
   x = 526,866.40