Finding the Fourth Proportional to 1,059.57, 1,462.05 and 661.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.57 : 1,462.05 = 661.05 : x
2. Step 2: Convert to fraction form
   1,059.57/1,462.05 = 661.05/x
3. Step 3: Cross multiply
   1,059.57x = 1,462.05 × 661.05
4. Step 4: Simplify right side
   1,059.57x = 966,488.15
5. Step 5: Solve for x
   x = 966,488.15/1,059.57
6. Step 6: Final answer
   x = 912.15