Finding the Fourth Proportional to 13,111.80, 18,093.18 and 7,445.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.80 : 18,093.18 = 7,445.40 : x
2. Step 2: Convert to fraction form
   13,111.80/18,093.18 = 7,445.40/x
3. Step 3: Cross multiply
   13,111.80x = 18,093.18 × 7,445.40
4. Step 4: Simplify right side
   13,111.80x = 134,710,962.37
5. Step 5: Solve for x
   x = 134,710,962.37/13,111.80
6. Step 6: Final answer
   x = 10,274.03