Finding the Fourth Proportional to 12,148.58, 18,181.72 and 7,471.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,148.58 : 18,181.72 = 7,471.55 : x
2. Step 2: Convert to fraction form
   12,148.58/18,181.72 = 7,471.55/x
3. Step 3: Cross multiply
   12,148.58x = 18,181.72 × 7,471.55
4. Step 4: Simplify right side
   12,148.58x = 135,845,630.07
5. Step 5: Solve for x
   x = 135,845,630.07/12,148.58
6. Step 6: Final answer
   x = 11,182.02