Finding the Fourth Proportional to 395,221.71, 592,926.89 and 128,982.72

Step by Step Solution

1. Step 1: Write the proportion equation
   395,221.71 : 592,926.89 = 128,982.72 : x
2. Step 2: Convert to fraction form
   395,221.71/592,926.89 = 128,982.72/x
3. Step 3: Cross multiply
   395,221.71x = 592,926.89 × 128,982.72
4. Step 4: Simplify right side
   395,221.71x = 76,477,322,388.43
5. Step 5: Solve for x
   x = 76,477,322,388.43/395,221.71
6. Step 6: Final answer
   x = 193,504.86