Finding the Fourth Proportional to 120,397.32, 166,175.88 and 80,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,397.32 : 166,175.88 = 80,112.72 : x
2. Step 2: Convert to fraction form
   120,397.32/166,175.88 = 80,112.72/x
3. Step 3: Cross multiply
   120,397.32x = 166,175.88 × 80,112.72
4. Step 4: Simplify right side
   120,397.32x = 13,312,801,745.19
5. Step 5: Solve for x
   x = 13,312,801,745.19/120,397.32
6. Step 6: Final answer
   x = 110,573.90