Finding the Fourth Proportional to 2,930.28, 4,396.43 and 1,288.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,930.28 : 4,396.43 = 1,288.01 : x
2. Step 2: Convert to fraction form
   2,930.28/4,396.43 = 1,288.01/x
3. Step 3: Cross multiply
   2,930.28x = 4,396.43 × 1,288.01
4. Step 4: Simplify right side
   2,930.28x = 5,662,627.04
5. Step 5: Solve for x
   x = 5,662,627.04/2,930.28
6. Step 6: Final answer
   x = 1,932.45