Finding the Fourth Proportional to 2,365.12, 3,531.56 and 2,116.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,365.12 : 3,531.56 = 2,116.72 : x
2. Step 2: Convert to fraction form
   2,365.12/3,531.56 = 2,116.72/x
3. Step 3: Cross multiply
   2,365.12x = 3,531.56 × 2,116.72
4. Step 4: Simplify right side
   2,365.12x = 7,475,323.68
5. Step 5: Solve for x
   x = 7,475,323.68/2,365.12
6. Step 6: Final answer
   x = 3,160.65