Finding the Fourth Proportional to 9,084.78, 12,535.59 and 5,105.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,084.78 : 12,535.59 = 5,105.13 : x
2. Step 2: Convert to fraction form
   9,084.78/12,535.59 = 5,105.13/x
3. Step 3: Cross multiply
   9,084.78x = 12,535.59 × 5,105.13
4. Step 4: Simplify right side
   9,084.78x = 63,995,816.58
5. Step 5: Solve for x
   x = 63,995,816.58/9,084.78
6. Step 6: Final answer
   x = 7,044.29