Finding the Fourth Proportional to 383,809.03, 575,311.37 and 215,081.98

Step by Step Solution

1. Step 1: Write the proportion equation
   383,809.03 : 575,311.37 = 215,081.98 : x
2. Step 2: Convert to fraction form
   383,809.03/575,311.37 = 215,081.98/x
3. Step 3: Cross multiply
   383,809.03x = 575,311.37 × 215,081.98
4. Step 4: Simplify right side
   383,809.03x = 123,739,107,500.70
5. Step 5: Solve for x
   x = 123,739,107,500.70/383,809.03
6. Step 6: Final answer
   x = 322,397.59