Finding the Fourth Proportional to 13,055.28, 18,015.80 and 7,086.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,055.28 : 18,015.80 = 7,086.82 : x
2. Step 2: Convert to fraction form
   13,055.28/18,015.80 = 7,086.82/x
3. Step 3: Cross multiply
   13,055.28x = 18,015.80 × 7,086.82
4. Step 4: Simplify right side
   13,055.28x = 127,674,704.43
5. Step 5: Solve for x
   x = 127,674,704.43/13,055.28
6. Step 6: Final answer
   x = 9,779.55