Finding the Fourth Proportional to 1,436.71, 2,158.56 and 1,178.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.71 : 2,158.56 = 1,178.41 : x
2. Step 2: Convert to fraction form
   1,436.71/2,158.56 = 1,178.41/x
3. Step 3: Cross multiply
   1,436.71x = 2,158.56 × 1,178.41
4. Step 4: Simplify right side
   1,436.71x = 2,543,668.69
5. Step 5: Solve for x
   x = 2,543,668.69/1,436.71
6. Step 6: Final answer
   x = 1,770.48