Finding the Fourth Proportional to 2,680.48, 3,699.03 and 1,561.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.48 : 3,699.03 = 1,561.60 : x
2. Step 2: Convert to fraction form
   2,680.48/3,699.03 = 1,561.60/x
3. Step 3: Cross multiply
   2,680.48x = 3,699.03 × 1,561.60
4. Step 4: Simplify right side
   2,680.48x = 5,776,405.25
5. Step 5: Solve for x
   x = 5,776,405.25/2,680.48
6. Step 6: Final answer
   x = 2,154.99