Finding the Fourth Proportional to 570,401.79, 856,443.78 and 318,175.08

Step by Step Solution

1. Step 1: Write the proportion equation
   570,401.79 : 856,443.78 = 318,175.08 : x
2. Step 2: Convert to fraction form
   570,401.79/856,443.78 = 318,175.08/x
3. Step 3: Cross multiply
   570,401.79x = 856,443.78 × 318,175.08
4. Step 4: Simplify right side
   570,401.79x = 272,499,068,217.00
5. Step 5: Solve for x
   x = 272,499,068,217.00/570,401.79
6. Step 6: Final answer
   x = 477,731.79