Finding the Fourth Proportional to 13,086.12, 18,059.04 and 7,781.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.12 : 18,059.04 = 7,781.52 : x
2. Step 2: Convert to fraction form
   13,086.12/18,059.04 = 7,781.52/x
3. Step 3: Cross multiply
   13,086.12x = 18,059.04 × 7,781.52
4. Step 4: Simplify right side
   13,086.12x = 140,526,780.94
5. Step 5: Solve for x
   x = 140,526,780.94/13,086.12
6. Step 6: Final answer
   x = 10,738.61