Finding the Fourth Proportional to 342,155.50, 472,164.78 and 189,191.02

Step by Step Solution

1. Step 1: Write the proportion equation
   342,155.50 : 472,164.78 = 189,191.02 : x
2. Step 2: Convert to fraction form
   342,155.50/472,164.78 = 189,191.02/x
3. Step 3: Cross multiply
   342,155.50x = 472,164.78 × 189,191.02
4. Step 4: Simplify right side
   342,155.50x = 89,329,336,336.28
5. Step 5: Solve for x
   x = 89,329,336,336.28/342,155.50
6. Step 6: Final answer
   x = 261,078.18