Finding the Third Proportional to 458,129.25 and 699,043.50

Step by Step Solution

1. Step 1: Write the proportion equation
   458,129.25 : 699,043.50 = 699,043.50 : x
2. Step 2: Convert to fraction form
   458,129.25/699,043.50 = 699,043.50/x
3. Step 3: Cross multiply
   458,129.25x = 699,043.50 × 699,043.50
4. Step 4: Simplify right side
   458,129.25x = 488,661,814,892.25
5. Step 5: Solve for x
   x = 488,661,814,892.25/458,129.25
6. Step 6: Final answer
   x = 1,066,646.18