Finding the Fourth Proportional to 23,236.61, 34,871.18 and 13,870.71

Step by Step Solution

1. Step 1: Write the proportion equation
   23,236.61 : 34,871.18 = 13,870.71 : x
2. Step 2: Convert to fraction form
   23,236.61/34,871.18 = 13,870.71/x
3. Step 3: Cross multiply
   23,236.61x = 34,871.18 × 13,870.71
4. Step 4: Simplify right side
   23,236.61x = 483,687,955.78
5. Step 5: Solve for x
   x = 483,687,955.78/23,236.61
6. Step 6: Final answer
   x = 20,815.78