Finding the Fourth Proportional to 12,841.14, 17,720.18 and 7,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,841.14 : 17,720.18 = 7,540.50 : x
2. Step 2: Convert to fraction form
   12,841.14/17,720.18 = 7,540.50/x
3. Step 3: Cross multiply
   12,841.14x = 17,720.18 × 7,540.50
4. Step 4: Simplify right side
   12,841.14x = 133,619,017.29
5. Step 5: Solve for x
   x = 133,619,017.29/12,841.14
6. Step 6: Final answer
   x = 10,405.54