Finding the Fourth Proportional to 10,891.27, 16,338.53 and 3,870.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,891.27 : 16,338.53 = 3,870.70 : x
2. Step 2: Convert to fraction form
   10,891.27/16,338.53 = 3,870.70/x
3. Step 3: Cross multiply
   10,891.27x = 16,338.53 × 3,870.70
4. Step 4: Simplify right side
   10,891.27x = 63,241,528.72
5. Step 5: Solve for x
   x = 63,241,528.72/10,891.27
6. Step 6: Final answer
   x = 5,806.63