Finding the Third Proportional to 196,510.50 and 421,060.50

Step by Step Solution

1. Step 1: Write the proportion equation
   196,510.50 : 421,060.50 = 421,060.50 : x
2. Step 2: Convert to fraction form
   196,510.50/421,060.50 = 421,060.50/x
3. Step 3: Cross multiply
   196,510.50x = 421,060.50 × 421,060.50
4. Step 4: Simplify right side
   196,510.50x = 177,291,944,660.25
5. Step 5: Solve for x
   x = 177,291,944,660.25/196,510.50
6. Step 6: Final answer
   x = 902,200.87