Finding the Fourth Proportional to 1,530.02, 2,111.42 and 831.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.02 : 2,111.42 = 831.39 : x
2. Step 2: Convert to fraction form
   1,530.02/2,111.42 = 831.39/x
3. Step 3: Cross multiply
   1,530.02x = 2,111.42 × 831.39
4. Step 4: Simplify right side
   1,530.02x = 1,755,413.47
5. Step 5: Solve for x
   x = 1,755,413.47/1,530.02
6. Step 6: Final answer
   x = 1,147.32