Finding the Third Proportional to 199,639.31 and 435,408.56

Step by Step Solution

1. Step 1: Write the proportion equation
   199,639.31 : 435,408.56 = 435,408.56 : x
2. Step 2: Convert to fraction form
   199,639.31/435,408.56 = 435,408.56/x
3. Step 3: Cross multiply
   199,639.31x = 435,408.56 × 435,408.56
4. Step 4: Simplify right side
   199,639.31x = 189,580,616,298.32
5. Step 5: Solve for x
   x = 189,580,616,298.32/199,639.31
6. Step 6: Final answer
   x = 949,615.65