Finding the Third Proportional to 576,516 and 842,557.50

Step by Step Solution

1. Step 1: Write the proportion equation
   576,516 : 842,557.50 = 842,557.50 : x
2. Step 2: Convert to fraction form
   576,516/842,557.50 = 842,557.50/x
3. Step 3: Cross multiply
   576,516x = 842,557.50 × 842,557.50
4. Step 4: Simplify right side
   576,516x = 709,903,140,806.25
5. Step 5: Solve for x
   x = 709,903,140,806.25/576,516
6. Step 6: Final answer
   x = 1,231,367.63