Finding the Fourth Proportional to 1,059.71, 1,461.71 and 666.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.71 : 1,461.71 = 666.05 : x
2. Step 2: Convert to fraction form
   1,059.71/1,461.71 = 666.05/x
3. Step 3: Cross multiply
   1,059.71x = 1,461.71 × 666.05
4. Step 4: Simplify right side
   1,059.71x = 973,566.30
5. Step 5: Solve for x
   x = 973,566.30/1,059.71
6. Step 6: Final answer
   x = 918.71