Finding the Fourth Proportional to 9,128.91, 13,665.42 and 5,845.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.91 : 13,665.42 = 5,845.17 : x
2. Step 2: Convert to fraction form
   9,128.91/13,665.42 = 5,845.17/x
3. Step 3: Cross multiply
   9,128.91x = 13,665.42 × 5,845.17
4. Step 4: Simplify right side
   9,128.91x = 79,876,703.02
5. Step 5: Solve for x
   x = 79,876,703.02/9,128.91
6. Step 6: Final answer
   x = 8,749.86