Finding the Fourth Proportional to 9,105.68, 12,539.40 and 7,910.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.68 : 12,539.40 = 7,910.12 : x
2. Step 2: Convert to fraction form
   9,105.68/12,539.40 = 7,910.12/x
3. Step 3: Cross multiply
   9,105.68x = 12,539.40 × 7,910.12
4. Step 4: Simplify right side
   9,105.68x = 99,188,158.73
5. Step 5: Solve for x
   x = 99,188,158.73/9,105.68
6. Step 6: Final answer
   x = 10,893.00