Finding the Fourth Proportional to 18,820.81, 25,972.72 and 10,437.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,820.81 : 25,972.72 = 10,437.31 : x
2. Step 2: Convert to fraction form
   18,820.81/25,972.72 = 10,437.31/x
3. Step 3: Cross multiply
   18,820.81x = 25,972.72 × 10,437.31
4. Step 4: Simplify right side
   18,820.81x = 271,085,336.56
5. Step 5: Solve for x
   x = 271,085,336.56/18,820.81
6. Step 6: Final answer
   x = 14,403.49