Finding the Fourth Proportional to 711,406.50, 1,067,111.57 and 290,682.37

Step by Step Solution

1. Step 1: Write the proportion equation
   711,406.50 : 1,067,111.57 = 290,682.37 : x
2. Step 2: Convert to fraction form
   711,406.50/1,067,111.57 = 290,682.37/x
3. Step 3: Cross multiply
   711,406.50x = 1,067,111.57 × 290,682.37
4. Step 4: Simplify right side
   711,406.50x = 310,190,520,222.02
5. Step 5: Solve for x
   x = 310,190,520,222.02/711,406.50
6. Step 6: Final answer
   x = 436,024.30