Finding the Fourth Proportional to 2,009.72, 3,020.26 and 1,188.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.72 : 3,020.26 = 1,188.12 : x
2. Step 2: Convert to fraction form
   2,009.72/3,020.26 = 1,188.12/x
3. Step 3: Cross multiply
   2,009.72x = 3,020.26 × 1,188.12
4. Step 4: Simplify right side
   2,009.72x = 3,588,431.31
5. Step 5: Solve for x
   x = 3,588,431.31/2,009.72
6. Step 6: Final answer
   x = 1,785.54