Finding the Fourth Proportional to 8,111.12, 12,129.61 and 5,897.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.12 : 12,129.61 = 5,897.39 : x
2. Step 2: Convert to fraction form
   8,111.12/12,129.61 = 5,897.39/x
3. Step 3: Cross multiply
   8,111.12x = 12,129.61 × 5,897.39
4. Step 4: Simplify right side
   8,111.12x = 71,532,965.33
5. Step 5: Solve for x
   x = 71,532,965.33/8,111.12
6. Step 6: Final answer
   x = 8,819.13