Finding the Third Proportional to 520,554 and 787,396.50

Step by Step Solution

1. Step 1: Write the proportion equation
   520,554 : 787,396.50 = 787,396.50 : x
2. Step 2: Convert to fraction form
   520,554/787,396.50 = 787,396.50/x
3. Step 3: Cross multiply
   520,554x = 787,396.50 × 787,396.50
4. Step 4: Simplify right side
   520,554x = 619,993,248,212.25
5. Step 5: Solve for x
   x = 619,993,248,212.25/520,554
6. Step 6: Final answer
   x = 1,191,025.81