Finding the Fourth Proportional to 383,025.42, 528,591.42 and 213,259.50

Step by Step Solution

1. Step 1: Write the proportion equation
   383,025.42 : 528,591.42 = 213,259.50 : x
2. Step 2: Convert to fraction form
   383,025.42/528,591.42 = 213,259.50/x
3. Step 3: Cross multiply
   383,025.42x = 528,591.42 × 213,259.50
4. Step 4: Simplify right side
   383,025.42x = 112,727,141,933.49
5. Step 5: Solve for x
   x = 112,727,141,933.49/383,025.42
6. Step 6: Final answer
   x = 294,307.21