Finding the Fourth Proportional to 13,054.86, 18,015.73 and 7,086.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,054.86 : 18,015.73 = 7,086.53 : x
2. Step 2: Convert to fraction form
   13,054.86/18,015.73 = 7,086.53/x
3. Step 3: Cross multiply
   13,054.86x = 18,015.73 × 7,086.53
4. Step 4: Simplify right side
   13,054.86x = 127,669,011.12
5. Step 5: Solve for x
   x = 127,669,011.12/13,054.86
6. Step 6: Final answer
   x = 9,779.42