Finding the Fourth Proportional to 120,501.99, 166,327.16 and 72,758.57

Step by Step Solution

1. Step 1: Write the proportion equation
   120,501.99 : 166,327.16 = 72,758.57 : x
2. Step 2: Convert to fraction form
   120,501.99/166,327.16 = 72,758.57/x
3. Step 3: Cross multiply
   120,501.99x = 166,327.16 × 72,758.57
4. Step 4: Simplify right side
   120,501.99x = 12,101,725,118.33
5. Step 5: Solve for x
   x = 12,101,725,118.33/120,501.99
6. Step 6: Final answer
   x = 100,427.60