Finding the Fourth Proportional to 3,146.30, 4,719.72 and 1,066.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,146.30 : 4,719.72 = 1,066.40 : x
2. Step 2: Convert to fraction form
   3,146.30/4,719.72 = 1,066.40/x
3. Step 3: Cross multiply
   3,146.30x = 4,719.72 × 1,066.40
4. Step 4: Simplify right side
   3,146.30x = 5,033,109.41
5. Step 5: Solve for x
   x = 5,033,109.41/3,146.30
6. Step 6: Final answer
   x = 1,599.69