Finding the Fourth Proportional to 120,488.56, 166,278.48 and 72,732.56

Step by Step Solution

1. Step 1: Write the proportion equation
   120,488.56 : 166,278.48 = 72,732.56 : x
2. Step 2: Convert to fraction form
   120,488.56/166,278.48 = 72,732.56/x
3. Step 3: Cross multiply
   120,488.56x = 166,278.48 × 72,732.56
4. Step 4: Simplify right side
   120,488.56x = 12,093,859,523.31
5. Step 5: Solve for x
   x = 12,093,859,523.31/120,488.56
6. Step 6: Final answer
   x = 100,373.51