Finding the Third Proportional to 432,355.50 and 687,025.50

Step by Step Solution

1. Step 1: Write the proportion equation
   432,355.50 : 687,025.50 = 687,025.50 : x
2. Step 2: Convert to fraction form
   432,355.50/687,025.50 = 687,025.50/x
3. Step 3: Cross multiply
   432,355.50x = 687,025.50 × 687,025.50
4. Step 4: Simplify right side
   432,355.50x = 472,004,037,650.25
5. Step 5: Solve for x
   x = 472,004,037,650.25/432,355.50
6. Step 6: Final answer
   x = 1,091,703.56