Finding the Fourth Proportional to 9,042.78, 12,479.16 and 5,897.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.78 : 12,479.16 = 5,897.16 : x
2. Step 2: Convert to fraction form
   9,042.78/12,479.16 = 5,897.16/x
3. Step 3: Cross multiply
   9,042.78x = 12,479.16 × 5,897.16
4. Step 4: Simplify right side
   9,042.78x = 73,591,603.19
5. Step 5: Solve for x
   x = 73,591,603.19/9,042.78
6. Step 6: Final answer
   x = 8,138.16