Finding the Fourth Proportional to 2,561.49, 3,533.98 and 1,553.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.49 : 3,533.98 = 1,553.51 : x
2. Step 2: Convert to fraction form
   2,561.49/3,533.98 = 1,553.51/x
3. Step 3: Cross multiply
   2,561.49x = 3,533.98 × 1,553.51
4. Step 4: Simplify right side
   2,561.49x = 5,490,047.83
5. Step 5: Solve for x
   x = 5,490,047.83/2,561.49
6. Step 6: Final answer
   x = 2,143.30