Finding the Fourth Proportional to 1,561.62, 2,159.76 and 1,395.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.62 : 2,159.76 = 1,395.54 : x
2. Step 2: Convert to fraction form
   1,561.62/2,159.76 = 1,395.54/x
3. Step 3: Cross multiply
   1,561.62x = 2,159.76 × 1,395.54
4. Step 4: Simplify right side
   1,561.62x = 3,014,031.47
5. Step 5: Solve for x
   x = 3,014,031.47/1,561.62
6. Step 6: Final answer
   x = 1,930.07