Finding the Fourth Proportional to 342,443.98, 472,563.56 and 189,478.18

Step by Step Solution

1. Step 1: Write the proportion equation
   342,443.98 : 472,563.56 = 189,478.18 : x
2. Step 2: Convert to fraction form
   342,443.98/472,563.56 = 189,478.18/x
3. Step 3: Cross multiply
   342,443.98x = 472,563.56 × 189,478.18
4. Step 4: Simplify right side
   342,443.98x = 89,540,483,283.12
5. Step 5: Solve for x
   x = 89,540,483,283.12/342,443.98
6. Step 6: Final answer
   x = 261,474.84