Finding the Fourth Proportional to 12,393.10, 17,106.90 and 7,357.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,393.10 : 17,106.90 = 7,357.31 : x
2. Step 2: Convert to fraction form
   12,393.10/17,106.90 = 7,357.31/x
3. Step 3: Cross multiply
   12,393.10x = 17,106.90 × 7,357.31
4. Step 4: Simplify right side
   12,393.10x = 125,860,680.90
5. Step 5: Solve for x
   x = 125,860,680.90/12,393.10
6. Step 6: Final answer
   x = 10,155.71