Finding the Fourth Proportional to 1,572.28, 2,169.72 and 942.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.28 : 2,169.72 = 942.88 : x
2. Step 2: Convert to fraction form
   1,572.28/2,169.72 = 942.88/x
3. Step 3: Cross multiply
   1,572.28x = 2,169.72 × 942.88
4. Step 4: Simplify right side
   1,572.28x = 2,045,785.59
5. Step 5: Solve for x
   x = 2,045,785.59/1,572.28
6. Step 6: Final answer
   x = 1,301.16