Finding the Fourth Proportional to 13,103.86, 18,085.92 and 7,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,103.86 : 18,085.92 = 7,438.72 : x
2. Step 2: Convert to fraction form
   13,103.86/18,085.92 = 7,438.72/x
3. Step 3: Cross multiply
   13,103.86x = 18,085.92 × 7,438.72
4. Step 4: Simplify right side
   13,103.86x = 134,536,094.82
5. Step 5: Solve for x
   x = 134,536,094.82/13,103.86
6. Step 6: Final answer
   x = 10,266.91