Finding the Fourth Proportional to 13,111.86, 19,670.62 and 6,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.86 : 19,670.62 = 6,086.72 : x
2. Step 2: Convert to fraction form
   13,111.86/19,670.62 = 6,086.72/x
3. Step 3: Cross multiply
   13,111.86x = 19,670.62 × 6,086.72
4. Step 4: Simplify right side
   13,111.86x = 119,729,556.17
5. Step 5: Solve for x
   x = 119,729,556.17/13,111.86
6. Step 6: Final answer
   x = 9,131.39