Finding the Fourth Proportional to 11,384.55, 17,078.87 and 5,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,384.55 : 17,078.87 = 5,147.50 : x
2. Step 2: Convert to fraction form
   11,384.55/17,078.87 = 5,147.50/x
3. Step 3: Cross multiply
   11,384.55x = 17,078.87 × 5,147.50
4. Step 4: Simplify right side
   11,384.55x = 87,913,397.93
5. Step 5: Solve for x
   x = 87,913,397.93/11,384.55
6. Step 6: Final answer
   x = 7,722.17