Finding the Fourth Proportional to 13,315.98, 18,376.15 and 7,347.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.98 : 18,376.15 = 7,347.86 : x
2. Step 2: Convert to fraction form
   13,315.98/18,376.15 = 7,347.86/x
3. Step 3: Cross multiply
   13,315.98x = 18,376.15 × 7,347.86
4. Step 4: Simplify right side
   13,315.98x = 135,025,377.54
5. Step 5: Solve for x
   x = 135,025,377.54/13,315.98
6. Step 6: Final answer
   x = 10,140.10