Finding the Fourth Proportional to 23,120.42, 31,907 and 13,051.32

Step by Step Solution

1. Step 1: Write the proportion equation
   23,120.42 : 31,907 = 13,051.32 : x
2. Step 2: Convert to fraction form
   23,120.42/31,907 = 13,051.32/x
3. Step 3: Cross multiply
   23,120.42x = 31,907 × 13,051.32
4. Step 4: Simplify right side
   23,120.42x = 416,428,467.24
5. Step 5: Solve for x
   x = 416,428,467.24/23,120.42
6. Step 6: Final answer
   x = 18,011.28