Finding the Third Proportional to 91,815 and 191,875.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,815 : 191,875.50 = 191,875.50 : x
2. Step 2: Convert to fraction form
   91,815/191,875.50 = 191,875.50/x
3. Step 3: Cross multiply
   91,815x = 191,875.50 × 191,875.50
4. Step 4: Simplify right side
   91,815x = 36,816,207,500.25
5. Step 5: Solve for x
   x = 36,816,207,500.25/91,815
6. Step 6: Final answer
   x = 400,982.49