Finding the Fourth Proportional to 13,126.86, 18,109.71 and 8,019.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,126.86 : 18,109.71 = 8,019.72 : x
2. Step 2: Convert to fraction form
   13,126.86/18,109.71 = 8,019.72/x
3. Step 3: Cross multiply
   13,126.86x = 18,109.71 × 8,019.72
4. Step 4: Simplify right side
   13,126.86x = 145,234,803.48
5. Step 5: Solve for x
   x = 145,234,803.48/13,126.86
6. Step 6: Final answer
   x = 11,063.94