Finding the Fourth Proportional to 13,096.86, 18,074.06 and 7,128.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.86 : 18,074.06 = 7,128.92 : x
2. Step 2: Convert to fraction form
   13,096.86/18,074.06 = 7,128.92/x
3. Step 3: Cross multiply
   13,096.86x = 18,074.06 × 7,128.92
4. Step 4: Simplify right side
   13,096.86x = 128,848,401.80
5. Step 5: Solve for x
   x = 128,848,401.80/13,096.86
6. Step 6: Final answer
   x = 9,838.11