Finding the Fourth Proportional to 2,696.21, 3,720.33 and 1,561.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,696.21 : 3,720.33 = 1,561.48 : x
2. Step 2: Convert to fraction form
   2,696.21/3,720.33 = 1,561.48/x
3. Step 3: Cross multiply
   2,696.21x = 3,720.33 × 1,561.48
4. Step 4: Simplify right side
   2,696.21x = 5,809,225.54
5. Step 5: Solve for x
   x = 5,809,225.54/2,696.21
6. Step 6: Final answer
   x = 2,154.59