Finding the Fourth Proportional to 1,530.01, 2,111.45 and 831.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.01 : 2,111.45 = 831.43 : x
2. Step 2: Convert to fraction form
   1,530.01/2,111.45 = 831.43/x
3. Step 3: Cross multiply
   1,530.01x = 2,111.45 × 831.43
4. Step 4: Simplify right side
   1,530.01x = 1,755,518.72
5. Step 5: Solve for x
   x = 1,755,518.72/1,530.01
6. Step 6: Final answer
   x = 1,147.39