Finding the Third Proportional to 520,087 and 776,698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   520,087 : 776,698.50 = 776,698.50 : x
2. Step 2: Convert to fraction form
   520,087/776,698.50 = 776,698.50/x
3. Step 3: Cross multiply
   520,087x = 776,698.50 × 776,698.50
4. Step 4: Simplify right side
   520,087x = 603,260,559,902.25
5. Step 5: Solve for x
   x = 603,260,559,902.25/520,087
6. Step 6: Final answer
   x = 1,159,922.40