Finding the Fourth Proportional to 80,188.38, 120,167.55 and 45,054.09

Step by Step Solution

1. Step 1: Write the proportion equation
   80,188.38 : 120,167.55 = 45,054.09 : x
2. Step 2: Convert to fraction form
   80,188.38/120,167.55 = 45,054.09/x
3. Step 3: Cross multiply
   80,188.38x = 120,167.55 × 45,054.09
4. Step 4: Simplify right side
   80,188.38x = 5,414,039,612.78
5. Step 5: Solve for x
   x = 5,414,039,612.78/80,188.38
6. Step 6: Final answer
   x = 67,516.51