Finding the Fourth Proportional to 13,111.34, 18,093.96 and 7,445.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.34 : 18,093.96 = 7,445.20 : x
2. Step 2: Convert to fraction form
   13,111.34/18,093.96 = 7,445.20/x
3. Step 3: Cross multiply
   13,111.34x = 18,093.96 × 7,445.20
4. Step 4: Simplify right side
   13,111.34x = 134,713,150.99
5. Step 5: Solve for x
   x = 134,713,150.99/13,111.34
6. Step 6: Final answer
   x = 10,274.55