Finding the Fourth Proportional to 13,086.23, 18,059.29 and 7,118.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.23 : 18,059.29 = 7,118.21 : x
2. Step 2: Convert to fraction form
   13,086.23/18,059.29 = 7,118.21/x
3. Step 3: Cross multiply
   13,086.23x = 18,059.29 × 7,118.21
4. Step 4: Simplify right side
   13,086.23x = 128,549,846.02
5. Step 5: Solve for x
   x = 128,549,846.02/13,086.23
6. Step 6: Final answer
   x = 9,823.29