Finding the Fourth Proportional to 342,290.70, 472,320.06 and 189,308.10

Step by Step Solution

1. Step 1: Write the proportion equation
   342,290.70 : 472,320.06 = 189,308.10 : x
2. Step 2: Convert to fraction form
   342,290.70/472,320.06 = 189,308.10/x
3. Step 3: Cross multiply
   342,290.70x = 472,320.06 × 189,308.10
4. Step 4: Simplify right side
   342,290.70x = 89,414,013,150.49
5. Step 5: Solve for x
   x = 89,414,013,150.49/342,290.70
6. Step 6: Final answer
   x = 261,222.44