Finding the Fourth Proportional to 6,128.51, 9,180.72 and 4,042.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.51 : 9,180.72 = 4,042.15 : x
2. Step 2: Convert to fraction form
   6,128.51/9,180.72 = 4,042.15/x
3. Step 3: Cross multiply
   6,128.51x = 9,180.72 × 4,042.15
4. Step 4: Simplify right side
   6,128.51x = 37,109,824.40
5. Step 5: Solve for x
   x = 37,109,824.40/6,128.51
6. Step 6: Final answer
   x = 6,055.28