Finding the Fourth Proportional to 3,886.83, 5,831.15 and 1,113.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.83 : 5,831.15 = 1,113.42 : x
2. Step 2: Convert to fraction form
   3,886.83/5,831.15 = 1,113.42/x
3. Step 3: Cross multiply
   3,886.83x = 5,831.15 × 1,113.42
4. Step 4: Simplify right side
   3,886.83x = 6,492,513.47
5. Step 5: Solve for x
   x = 6,492,513.47/3,886.83
6. Step 6: Final answer
   x = 1,670.39