Finding the Fourth Proportional to 475,840.10, 656,315.06 and 404,106.50

Step by Step Solution

1. Step 1: Write the proportion equation
   475,840.10 : 656,315.06 = 404,106.50 : x
2. Step 2: Convert to fraction form
   475,840.10/656,315.06 = 404,106.50/x
3. Step 3: Cross multiply
   475,840.10x = 656,315.06 × 404,106.50
4. Step 4: Simplify right side
   475,840.10x = 265,221,181,793.89
5. Step 5: Solve for x
   x = 265,221,181,793.89/475,840.10
6. Step 6: Final answer
   x = 557,374.59