Finding the Fourth Proportional to 395,025.93, 592,476.89 and 128,785.10

Step by Step Solution

1. Step 1: Write the proportion equation
   395,025.93 : 592,476.89 = 128,785.10 : x
2. Step 2: Convert to fraction form
   395,025.93/592,476.89 = 128,785.10/x
3. Step 3: Cross multiply
   395,025.93x = 592,476.89 × 128,785.10
4. Step 4: Simplify right side
   395,025.93x = 76,302,191,920.03
5. Step 5: Solve for x
   x = 76,302,191,920.03/395,025.93
6. Step 6: Final answer
   x = 193,157.43