Finding the Fourth Proportional to 383,145.34, 528,756.98 and 213,379.47

Step by Step Solution

1. Step 1: Write the proportion equation
   383,145.34 : 528,756.98 = 213,379.47 : x
2. Step 2: Convert to fraction form
   383,145.34/528,756.98 = 213,379.47/x
3. Step 3: Cross multiply
   383,145.34x = 528,756.98 × 213,379.47
4. Step 4: Simplify right side
   383,145.34x = 112,825,884,151.20
5. Step 5: Solve for x
   x = 112,825,884,151.20/383,145.34
6. Step 6: Final answer
   x = 294,472.81