Finding the Fourth Proportional to 342,128.91, 472,118.85 and 189,158.25

Step by Step Solution

1. Step 1: Write the proportion equation
   342,128.91 : 472,118.85 = 189,158.25 : x
2. Step 2: Convert to fraction form
   342,128.91/472,118.85 = 189,158.25/x
3. Step 3: Cross multiply
   342,128.91x = 472,118.85 × 189,158.25
4. Step 4: Simplify right side
   342,128.91x = 89,305,175,458.01
5. Step 5: Solve for x
   x = 89,305,175,458.01/342,128.91
6. Step 6: Final answer
   x = 261,027.85