Finding the Third Proportional to 270,810 and 378,591.75

Step by Step Solution

1. Step 1: Write the proportion equation
   270,810 : 378,591.75 = 378,591.75 : x
2. Step 2: Convert to fraction form
   270,810/378,591.75 = 378,591.75/x
3. Step 3: Cross multiply
   270,810x = 378,591.75 × 378,591.75
4. Step 4: Simplify right side
   270,810x = 143,331,713,168.06
5. Step 5: Solve for x
   x = 143,331,713,168.06/270,810
6. Step 6: Final answer
   x = 529,270.39