Finding the Fourth Proportional to 11,179.16, 15,433.69 and 7,781.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,179.16 : 15,433.69 = 7,781.11 : x
2. Step 2: Convert to fraction form
   11,179.16/15,433.69 = 7,781.11/x
3. Step 3: Cross multiply
   11,179.16x = 15,433.69 × 7,781.11
4. Step 4: Simplify right side
   11,179.16x = 120,091,282.96
5. Step 5: Solve for x
   x = 120,091,282.96/11,179.16
6. Step 6: Final answer
   x = 10,742.42