Finding the Third Proportional to 193,630.50 and 421,710

Step by Step Solution

1. Step 1: Write the proportion equation
   193,630.50 : 421,710 = 421,710 : x
2. Step 2: Convert to fraction form
   193,630.50/421,710 = 421,710/x
3. Step 3: Cross multiply
   193,630.50x = 421,710 × 421,710
4. Step 4: Simplify right side
   193,630.50x = 177,839,324,100
5. Step 5: Solve for x
   x = 177,839,324,100/193,630.50
6. Step 6: Final answer
   x = 918,446.86