Finding the Fourth Proportional to 711,404.50, 1,067,108.57 and 290,680.37

Step by Step Solution

1. Step 1: Write the proportion equation
   711,404.50 : 1,067,108.57 = 290,680.37 : x
2. Step 2: Convert to fraction form
   711,404.50/1,067,108.57 = 290,680.37/x
3. Step 3: Cross multiply
   711,404.50x = 1,067,108.57 × 290,680.37
4. Step 4: Simplify right side
   711,404.50x = 310,187,518,322.78
5. Step 5: Solve for x
   x = 310,187,518,322.78/711,404.50
6. Step 6: Final answer
   x = 436,021.31