Finding the Fourth Proportional to 120,807.82, 166,718.61 and 72,393.79

Step by Step Solution

1. Step 1: Write the proportion equation
   120,807.82 : 166,718.61 = 72,393.79 : x
2. Step 2: Convert to fraction form
   120,807.82/166,718.61 = 72,393.79/x
3. Step 3: Cross multiply
   120,807.82x = 166,718.61 × 72,393.79
4. Step 4: Simplify right side
   120,807.82x = 12,069,391,679.46
5. Step 5: Solve for x
   x = 12,069,391,679.46/120,807.82
6. Step 6: Final answer
   x = 99,905.72