Finding the Fourth Proportional to 342,322.20, 472,368.27 and 189,336.09

Step by Step Solution

1. Step 1: Write the proportion equation
   342,322.20 : 472,368.27 = 189,336.09 : x
2. Step 2: Convert to fraction form
   342,322.20/472,368.27 = 189,336.09/x
3. Step 3: Cross multiply
   342,322.20x = 472,368.27 × 189,336.09
4. Step 4: Simplify right side
   342,322.20x = 89,436,361,281.86
5. Step 5: Solve for x
   x = 89,436,361,281.86/342,322.20
6. Step 6: Final answer
   x = 261,263.69