Finding the Fourth Proportional to 15,443.87, 23,158.51 and 7,121.42

Step by Step Solution

1. Step 1: Write the proportion equation
   15,443.87 : 23,158.51 = 7,121.42 : x
2. Step 2: Convert to fraction form
   15,443.87/23,158.51 = 7,121.42/x
3. Step 3: Cross multiply
   15,443.87x = 23,158.51 × 7,121.42
4. Step 4: Simplify right side
   15,443.87x = 164,921,429.53
5. Step 5: Solve for x
   x = 164,921,429.53/15,443.87
6. Step 6: Final answer
   x = 10,678.77