Finding the Third Proportional to 672,716.25 and 1,042,699.50

Step by Step Solution

1. Step 1: Write the proportion equation
   672,716.25 : 1,042,699.50 = 1,042,699.50 : x
2. Step 2: Convert to fraction form
   672,716.25/1,042,699.50 = 1,042,699.50/x
3. Step 3: Cross multiply
   672,716.25x = 1,042,699.50 × 1,042,699.50
4. Step 4: Simplify right side
   672,716.25x = 1,087,222,247,300.25
5. Step 5: Solve for x
   x = 1,087,222,247,300.25/672,716.25
6. Step 6: Final answer
   x = 1,616,167.66