Finding the Fourth Proportional to 1,059.84, 1,461.42 and 666.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.84 : 1,461.42 = 666.18 : x
2. Step 2: Convert to fraction form
   1,059.84/1,461.42 = 666.18/x
3. Step 3: Cross multiply
   1,059.84x = 1,461.42 × 666.18
4. Step 4: Simplify right side
   1,059.84x = 973,568.78
5. Step 5: Solve for x
   x = 973,568.78/1,059.84
6. Step 6: Final answer
   x = 918.60