Finding the Fourth Proportional to 413,085.20, 570,056.01 and 231,796.71

Step by Step Solution

1. Step 1: Write the proportion equation
   413,085.20 : 570,056.01 = 231,796.71 : x
2. Step 2: Convert to fraction form
   413,085.20/570,056.01 = 231,796.71/x
3. Step 3: Cross multiply
   413,085.20x = 570,056.01 × 231,796.71
4. Step 4: Simplify right side
   413,085.20x = 132,137,107,633.73
5. Step 5: Solve for x
   x = 132,137,107,633.73/413,085.20
6. Step 6: Final answer
   x = 319,878.58