Finding the Fourth Proportional to 11,090.99, 15,287.33 and 7,861.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,090.99 : 15,287.33 = 7,861.89 : x
2. Step 2: Convert to fraction form
   11,090.99/15,287.33 = 7,861.89/x
3. Step 3: Cross multiply
   11,090.99x = 15,287.33 × 7,861.89
4. Step 4: Simplify right side
   11,090.99x = 120,187,191.11
5. Step 5: Solve for x
   x = 120,187,191.11/11,090.99
6. Step 6: Final answer
   x = 10,836.48