Finding the Fourth Proportional to 120,164.58, 180,402.69 and 80,437.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,164.58 : 180,402.69 = 80,437.72 : x
2. Step 2: Convert to fraction form
   120,164.58/180,402.69 = 80,437.72/x
3. Step 3: Cross multiply
   120,164.58x = 180,402.69 × 80,437.72
4. Step 4: Simplify right side
   120,164.58x = 14,511,181,065.47
5. Step 5: Solve for x
   x = 14,511,181,065.47/120,164.58
6. Step 6: Final answer
   x = 120,760.89