Finding the Fourth Proportional to 4,870.10, 6,831.10 and 4,870.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,870.10 : 6,831.10 = 4,870.10 : x
2. Step 2: Convert to fraction form
   4,870.10/6,831.10 = 4,870.10/x
3. Step 3: Cross multiply
   4,870.10x = 6,831.10 × 4,870.10
4. Step 4: Simplify right side
   4,870.10x = 33,268,140.11
5. Step 5: Solve for x
   x = 33,268,140.11/4,870.10
6. Step 6: Final answer
   x = 6,831.10