Finding the Fourth Proportional to 1,653.42, 2,479.77 and 831.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,653.42 : 2,479.77 = 831.45 : x
2. Step 2: Convert to fraction form
   1,653.42/2,479.77 = 831.45/x
3. Step 3: Cross multiply
   1,653.42x = 2,479.77 × 831.45
4. Step 4: Simplify right side
   1,653.42x = 2,061,804.77
5. Step 5: Solve for x
   x = 2,061,804.77/1,653.42
6. Step 6: Final answer
   x = 1,246.99