Finding the Fourth Proportional to 570,311.52, 787,066.56 and 328,589.76

Step by Step Solution

1. Step 1: Write the proportion equation
   570,311.52 : 787,066.56 = 328,589.76 : x
2. Step 2: Convert to fraction form
   570,311.52/787,066.56 = 328,589.76/x
3. Step 3: Cross multiply
   570,311.52x = 787,066.56 × 328,589.76
4. Step 4: Simplify right side
   570,311.52x = 258,622,012,054.43
5. Step 5: Solve for x
   x = 258,622,012,054.43/570,311.52
6. Step 6: Final answer
   x = 453,474.99