Finding the Fourth Proportional to 1,288.38, 1,930.20 and 1,150.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.38 : 1,930.20 = 1,150.02 : x
2. Step 2: Convert to fraction form
   1,288.38/1,930.20 = 1,150.02/x
3. Step 3: Cross multiply
   1,288.38x = 1,930.20 × 1,150.02
4. Step 4: Simplify right side
   1,288.38x = 2,219,768.60
5. Step 5: Solve for x
   x = 2,219,768.60/1,288.38
6. Step 6: Final answer
   x = 1,722.91