Finding the Fourth Proportional to 1,386.52, 1,913.58 and 966.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.52 : 1,913.58 = 966.60 : x
2. Step 2: Convert to fraction form
   1,386.52/1,913.58 = 966.60/x
3. Step 3: Cross multiply
   1,386.52x = 1,913.58 × 966.60
4. Step 4: Simplify right side
   1,386.52x = 1,849,666.43
5. Step 5: Solve for x
   x = 1,849,666.43/1,386.52
6. Step 6: Final answer
   x = 1,334.04