Finding the Fourth Proportional to 1,059.96, 1,462.32 and 661.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.96 : 1,462.32 = 661.40 : x
2. Step 2: Convert to fraction form
   1,059.96/1,462.32 = 661.40/x
3. Step 3: Cross multiply
   1,059.96x = 1,462.32 × 661.40
4. Step 4: Simplify right side
   1,059.96x = 967,178.45
5. Step 5: Solve for x
   x = 967,178.45/1,059.96
6. Step 6: Final answer
   x = 912.47