Finding the Fourth Proportional to 1,859.28, 2,563.50 and 1,561.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,859.28 : 2,563.50 = 1,561.69 : x
2. Step 2: Convert to fraction form
   1,859.28/2,563.50 = 1,561.69/x
3. Step 3: Cross multiply
   1,859.28x = 2,563.50 × 1,561.69
4. Step 4: Simplify right side
   1,859.28x = 4,003,392.32
5. Step 5: Solve for x
   x = 4,003,392.32/1,859.28
6. Step 6: Final answer
   x = 2,153.19