Finding the Fourth Proportional to 120,611.86, 166,335.42 and 75,294.03

Step by Step Solution

1. Step 1: Write the proportion equation
   120,611.86 : 166,335.42 = 75,294.03 : x
2. Step 2: Convert to fraction form
   120,611.86/166,335.42 = 75,294.03/x
3. Step 3: Cross multiply
   120,611.86x = 166,335.42 × 75,294.03
4. Step 4: Simplify right side
   120,611.86x = 12,524,064,103.54
5. Step 5: Solve for x
   x = 12,524,064,103.54/120,611.86
6. Step 6: Final answer
   x = 103,837.75