Finding the Fourth Proportional to 1,572.09, 2,169.54 and 942.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.09 : 2,169.54 = 942.72 : x
2. Step 2: Convert to fraction form
   1,572.09/2,169.54 = 942.72/x
3. Step 3: Cross multiply
   1,572.09x = 2,169.54 × 942.72
4. Step 4: Simplify right side
   1,572.09x = 2,045,268.75
5. Step 5: Solve for x
   x = 2,045,268.75/1,572.09
6. Step 6: Final answer
   x = 1,300.99