Finding the Fourth Proportional to 18,168.72, 25,070.58 and 10,513.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,168.72 : 25,070.58 = 10,513.31 : x
2. Step 2: Convert to fraction form
   18,168.72/25,070.58 = 10,513.31/x
3. Step 3: Cross multiply
   18,168.72x = 25,070.58 × 10,513.31
4. Step 4: Simplify right side
   18,168.72x = 263,574,779.42
5. Step 5: Solve for x
   x = 263,574,779.42/18,168.72
6. Step 6: Final answer
   x = 14,507.06