Finding the Third Proportional to 91,870.50 and 196,861.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,870.50 : 196,861.50 = 196,861.50 : x
2. Step 2: Convert to fraction form
   91,870.50/196,861.50 = 196,861.50/x
3. Step 3: Cross multiply
   91,870.50x = 196,861.50 × 196,861.50
4. Step 4: Simplify right side
   91,870.50x = 38,754,450,182.25
5. Step 5: Solve for x
   x = 38,754,450,182.25/91,870.50
6. Step 6: Final answer
   x = 421,837.81