Finding the Fourth Proportional to 342,274.89, 472,355.97 and 189,312.46

Step by Step Solution

1. Step 1: Write the proportion equation
   342,274.89 : 472,355.97 = 189,312.46 : x
2. Step 2: Convert to fraction form
   342,274.89/472,355.97 = 189,312.46/x
3. Step 3: Cross multiply
   342,274.89x = 472,355.97 × 189,312.46
4. Step 4: Simplify right side
   342,274.89x = 89,422,870,676.39
5. Step 5: Solve for x
   x = 89,422,870,676.39/342,274.89
6. Step 6: Final answer
   x = 261,260.39