Finding the Fourth Proportional to 13,540.08, 18,685.42 and 7,875.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,540.08 : 18,685.42 = 7,875.12 : x
2. Step 2: Convert to fraction form
   13,540.08/18,685.42 = 7,875.12/x
3. Step 3: Cross multiply
   13,540.08x = 18,685.42 × 7,875.12
4. Step 4: Simplify right side
   13,540.08x = 147,149,924.75
5. Step 5: Solve for x
   x = 147,149,924.75/13,540.08
6. Step 6: Final answer
   x = 10,867.73