Finding the Fourth Proportional to 1,559.76, 2,151.36 and 1,061.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.76 : 2,151.36 = 1,061.64 : x
2. Step 2: Convert to fraction form
   1,559.76/2,151.36 = 1,061.64/x
3. Step 3: Cross multiply
   1,559.76x = 2,151.36 × 1,061.64
4. Step 4: Simplify right side
   1,559.76x = 2,283,969.83
5. Step 5: Solve for x
   x = 2,283,969.83/1,559.76
6. Step 6: Final answer
   x = 1,464.31