Finding the Fourth Proportional to 383,789.12, 575,679.62 and 131,066.72

Step by Step Solution

1. Step 1: Write the proportion equation
   383,789.12 : 575,679.62 = 131,066.72 : x
2. Step 2: Convert to fraction form
   383,789.12/575,679.62 = 131,066.72/x
3. Step 3: Cross multiply
   383,789.12x = 575,679.62 × 131,066.72
4. Step 4: Simplify right side
   383,789.12x = 75,452,439,564.25
5. Step 5: Solve for x
   x = 75,452,439,564.25/383,789.12
6. Step 6: Final answer
   x = 196,598.69