Finding the Fourth Proportional to 2,457.05, 3,392.98 and 1,561.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.05 : 3,392.98 = 1,561.08 : x
2. Step 2: Convert to fraction form
   2,457.05/3,392.98 = 1,561.08/x
3. Step 3: Cross multiply
   2,457.05x = 3,392.98 × 1,561.08
4. Step 4: Simplify right side
   2,457.05x = 5,296,688.45
5. Step 5: Solve for x
   x = 5,296,688.45/2,457.05
6. Step 6: Final answer
   x = 2,155.71