Finding the Fourth Proportional to 3,339.50, 5,009.60 and 1,147.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,339.50 : 5,009.60 = 1,147.72 : x
2. Step 2: Convert to fraction form
   3,339.50/5,009.60 = 1,147.72/x
3. Step 3: Cross multiply
   3,339.50x = 5,009.60 × 1,147.72
4. Step 4: Simplify right side
   3,339.50x = 5,749,611.39
5. Step 5: Solve for x
   x = 5,749,611.39/3,339.50
6. Step 6: Final answer
   x = 1,721.70