Finding the Third Proportional to 605,191.50 and 910,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   605,191.50 : 910,399.50 = 910,399.50 : x
2. Step 2: Convert to fraction form
   605,191.50/910,399.50 = 910,399.50/x
3. Step 3: Cross multiply
   605,191.50x = 910,399.50 × 910,399.50
4. Step 4: Simplify right side
   605,191.50x = 828,827,249,600.25
5. Step 5: Solve for x
   x = 828,827,249,600.25/605,191.50
6. Step 6: Final answer
   x = 1,369,528.90