Finding the Fourth Proportional to 1,890.30, 2,831.87 and 1,066.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.30 : 2,831.87 = 1,066.07 : x
2. Step 2: Convert to fraction form
   1,890.30/2,831.87 = 1,066.07/x
3. Step 3: Cross multiply
   1,890.30x = 2,831.87 × 1,066.07
4. Step 4: Simplify right side
   1,890.30x = 3,018,981.40
5. Step 5: Solve for x
   x = 3,018,981.40/1,890.30
6. Step 6: Final answer
   x = 1,597.09