Finding the Fourth Proportional to 3,339.30, 5,009.31 and 1,147.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,339.30 : 5,009.31 = 1,147.77 : x
2. Step 2: Convert to fraction form
   3,339.30/5,009.31 = 1,147.77/x
3. Step 3: Cross multiply
   3,339.30x = 5,009.31 × 1,147.77
4. Step 4: Simplify right side
   3,339.30x = 5,749,535.74
5. Step 5: Solve for x
   x = 5,749,535.74/3,339.30
6. Step 6: Final answer
   x = 1,721.78