Finding the Fourth Proportional to 1,558.56, 2,151.18 and 1,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.56 : 2,151.18 = 1,061.40 : x
2. Step 2: Convert to fraction form
   1,558.56/2,151.18 = 1,061.40/x
3. Step 3: Cross multiply
   1,558.56x = 2,151.18 × 1,061.40
4. Step 4: Simplify right side
   1,558.56x = 2,283,262.45
5. Step 5: Solve for x
   x = 2,283,262.45/1,558.56
6. Step 6: Final answer
   x = 1,464.98