Finding the Third Proportional to 815,123.25 and 1,787,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   815,123.25 : 1,787,710.50 = 1,787,710.50 : x
2. Step 2: Convert to fraction form
   815,123.25/1,787,710.50 = 1,787,710.50/x
3. Step 3: Cross multiply
   815,123.25x = 1,787,710.50 × 1,787,710.50
4. Step 4: Simplify right side
   815,123.25x = 3,195,908,831,810.25
5. Step 5: Solve for x
   x = 3,195,908,831,810.25/815,123.25
6. Step 6: Final answer
   x = 3,920,767.60