Finding the Fourth Proportional to 13,055.31, 18,016.52 and 7,086.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,055.31 : 18,016.52 = 7,086.99 : x
2. Step 2: Convert to fraction form
   13,055.31/18,016.52 = 7,086.99/x
3. Step 3: Cross multiply
   13,055.31x = 18,016.52 × 7,086.99
4. Step 4: Simplify right side
   13,055.31x = 127,682,861.64
5. Step 5: Solve for x
   x = 127,682,861.64/13,055.31
6. Step 6: Final answer
   x = 9,780.15