Finding the Fourth Proportional to 120,689.82, 166,482.70 and 75,288.96

Step by Step Solution

1. Step 1: Write the proportion equation
   120,689.82 : 166,482.70 = 75,288.96 : x
2. Step 2: Convert to fraction form
   120,689.82/166,482.70 = 75,288.96/x
3. Step 3: Cross multiply
   120,689.82x = 166,482.70 × 75,288.96
4. Step 4: Simplify right side
   120,689.82x = 12,534,309,152.77
5. Step 5: Solve for x
   x = 12,534,309,152.77/120,689.82
6. Step 6: Final answer
   x = 103,855.56