Finding the Fourth Proportional to 383,170.72, 528,775.56 and 213,404.80

Step by Step Solution

1. Step 1: Write the proportion equation
   383,170.72 : 528,775.56 = 213,404.80 : x
2. Step 2: Convert to fraction form
   383,170.72/528,775.56 = 213,404.80/x
3. Step 3: Cross multiply
   383,170.72x = 528,775.56 × 213,404.80
4. Step 4: Simplify right side
   383,170.72x = 112,843,242,626.69
5. Step 5: Solve for x
   x = 112,843,242,626.69/383,170.72
6. Step 6: Final answer
   x = 294,498.61