Finding the Fourth Proportional to 13,117.27, 18,101.59 and 7,148.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,117.27 : 18,101.59 = 7,148.98 : x
2. Step 2: Convert to fraction form
   13,117.27/18,101.59 = 7,148.98/x
3. Step 3: Cross multiply
   13,117.27x = 18,101.59 × 7,148.98
4. Step 4: Simplify right side
   13,117.27x = 129,407,904.88
5. Step 5: Solve for x
   x = 129,407,904.88/13,117.27
6. Step 6: Final answer
   x = 9,865.46