Finding the Third Proportional to 424,139.25 and 877,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   424,139.25 : 877,801.50 = 877,801.50 : x
2. Step 2: Convert to fraction form
   424,139.25/877,801.50 = 877,801.50/x
3. Step 3: Cross multiply
   424,139.25x = 877,801.50 × 877,801.50
4. Step 4: Simplify right side
   424,139.25x = 770,535,473,402.25
5. Step 5: Solve for x
   x = 770,535,473,402.25/424,139.25
6. Step 6: Final answer
   x = 1,816,704.00