Finding the Fourth Proportional to 1,530.03, 2,111.38 and 831.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.03 : 2,111.38 = 831.39 : x
2. Step 2: Convert to fraction form
   1,530.03/2,111.38 = 831.39/x
3. Step 3: Cross multiply
   1,530.03x = 2,111.38 × 831.39
4. Step 4: Simplify right side
   1,530.03x = 1,755,380.22
5. Step 5: Solve for x
   x = 1,755,380.22/1,530.03
6. Step 6: Final answer
   x = 1,147.28