Finding the Fourth Proportional to 6,630.72, 9,146.54 and 4,142.40

Step by Step Solution

1. Step 1: Write the proportion equation
   6,630.72 : 9,146.54 = 4,142.40 : x
2. Step 2: Convert to fraction form
   6,630.72/9,146.54 = 4,142.40/x
3. Step 3: Cross multiply
   6,630.72x = 9,146.54 × 4,142.40
4. Step 4: Simplify right side
   6,630.72x = 37,888,627.30
5. Step 5: Solve for x
   x = 37,888,627.30/6,630.72
6. Step 6: Final answer
   x = 5,714.10