Finding the Third Proportional to 387,807.75 and 558,550.69

Step by Step Solution

1. Step 1: Write the proportion equation
   387,807.75 : 558,550.69 = 558,550.69 : x
2. Step 2: Convert to fraction form
   387,807.75/558,550.69 = 558,550.69/x
3. Step 3: Cross multiply
   387,807.75x = 558,550.69 × 558,550.69
4. Step 4: Simplify right side
   387,807.75x = 311,978,870,506.72
5. Step 5: Solve for x
   x = 311,978,870,506.72/387,807.75
6. Step 6: Final answer
   x = 804,467.86