Finding the Fourth Proportional to 395,066.59, 545,195.18 and 231,820.72

Step by Step Solution

1. Step 1: Write the proportion equation
   395,066.59 : 545,195.18 = 231,820.72 : x
2. Step 2: Convert to fraction form
   395,066.59/545,195.18 = 231,820.72/x
3. Step 3: Cross multiply
   395,066.59x = 545,195.18 × 231,820.72
4. Step 4: Simplify right side
   395,066.59x = 126,387,538,384.69
5. Step 5: Solve for x
   x = 126,387,538,384.69/395,066.59
6. Step 6: Final answer
   x = 319,914.52