Finding the Fourth Proportional to 13,054.55, 18,015.59 and 7,086.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,054.55 : 18,015.59 = 7,086.20 : x
2. Step 2: Convert to fraction form
   13,054.55/18,015.59 = 7,086.20/x
3. Step 3: Cross multiply
   13,054.55x = 18,015.59 × 7,086.20
4. Step 4: Simplify right side
   13,054.55x = 127,662,001.50
5. Step 5: Solve for x
   x = 127,662,001.50/13,054.55
6. Step 6: Final answer
   x = 9,779.12