Finding the Fourth Proportional to 4,781.30, 7,171.89 and 1,318.52

Step by Step Solution

1. Step 1: Write the proportion equation
   4,781.30 : 7,171.89 = 1,318.52 : x
2. Step 2: Convert to fraction form
   4,781.30/7,171.89 = 1,318.52/x
3. Step 3: Cross multiply
   4,781.30x = 7,171.89 × 1,318.52
4. Step 4: Simplify right side
   4,781.30x = 9,456,280.40
5. Step 5: Solve for x
   x = 9,456,280.40/4,781.30
6. Step 6: Final answer
   x = 1,977.76