Finding the Third Proportional to 147,972 and 240,406.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,972 : 240,406.50 = 240,406.50 : x
2. Step 2: Convert to fraction form
   147,972/240,406.50 = 240,406.50/x
3. Step 3: Cross multiply
   147,972x = 240,406.50 × 240,406.50
4. Step 4: Simplify right side
   147,972x = 57,795,285,242.25
5. Step 5: Solve for x
   x = 57,795,285,242.25/147,972
6. Step 6: Final answer
   x = 390,582.58