Finding the Fourth Proportional to 13,093.16, 18,054.42 and 9,315.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,093.16 : 18,054.42 = 9,315.32 : x
2. Step 2: Convert to fraction form
   13,093.16/18,054.42 = 9,315.32/x
3. Step 3: Cross multiply
   13,093.16x = 18,054.42 × 9,315.32
4. Step 4: Simplify right side
   13,093.16x = 168,182,699.71
5. Step 5: Solve for x
   x = 168,182,699.71/13,093.16
6. Step 6: Final answer
   x = 12,845.08