Finding the Third Proportional to 103,480 and 221,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,480 : 221,721.50 = 221,721.50 : x
2. Step 2: Convert to fraction form
   103,480/221,721.50 = 221,721.50/x
3. Step 3: Cross multiply
   103,480x = 221,721.50 × 221,721.50
4. Step 4: Simplify right side
   103,480x = 49,160,423,562.25
5. Step 5: Solve for x
   x = 49,160,423,562.25/103,480
6. Step 6: Final answer
   x = 475,071.74