Finding the Fourth Proportional to 13,055.05, 18,015.98 and 7,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,055.05 : 18,015.98 = 7,086.72 : x
2. Step 2: Convert to fraction form
   13,055.05/18,015.98 = 7,086.72/x
3. Step 3: Cross multiply
   13,055.05x = 18,015.98 × 7,086.72
4. Step 4: Simplify right side
   13,055.05x = 127,674,080.27
5. Step 5: Solve for x
   x = 127,674,080.27/13,055.05
6. Step 6: Final answer
   x = 9,779.67