Finding the Fourth Proportional to 12,847.41, 17,730.71 and 7,542.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,847.41 : 17,730.71 = 7,542.12 : x
2. Step 2: Convert to fraction form
   12,847.41/17,730.71 = 7,542.12/x
3. Step 3: Cross multiply
   12,847.41x = 17,730.71 × 7,542.12
4. Step 4: Simplify right side
   12,847.41x = 133,727,142.51
5. Step 5: Solve for x
   x = 133,727,142.51/12,847.41
6. Step 6: Final answer
   x = 10,408.88