Finding the Third Proportional to 561,429 and 862,969.50

Step by Step Solution

1. Step 1: Write the proportion equation
   561,429 : 862,969.50 = 862,969.50 : x
2. Step 2: Convert to fraction form
   561,429/862,969.50 = 862,969.50/x
3. Step 3: Cross multiply
   561,429x = 862,969.50 × 862,969.50
4. Step 4: Simplify right side
   561,429x = 744,716,357,930.25
5. Step 5: Solve for x
   x = 744,716,357,930.25/561,429
6. Step 6: Final answer
   x = 1,326,465.78