Finding the Third Proportional to 978,814.50 and 1,378,406.25

Step by Step Solution

1. Step 1: Write the proportion equation
   978,814.50 : 1,378,406.25 = 1,378,406.25 : x
2. Step 2: Convert to fraction form
   978,814.50/1,378,406.25 = 1,378,406.25/x
3. Step 3: Cross multiply
   978,814.50x = 1,378,406.25 × 1,378,406.25
4. Step 4: Simplify right side
   978,814.50x = 1,900,003,790,039.06
5. Step 5: Solve for x
   x = 1,900,003,790,039.06/978,814.50
6. Step 6: Final answer
   x = 1,941,127.55