Finding the Fourth Proportional to 120,809.58, 166,690.71 and 73,061.90

Step by Step Solution

1. Step 1: Write the proportion equation
   120,809.58 : 166,690.71 = 73,061.90 : x
2. Step 2: Convert to fraction form
   120,809.58/166,690.71 = 73,061.90/x
3. Step 3: Cross multiply
   120,809.58x = 166,690.71 × 73,061.90
4. Step 4: Simplify right side
   120,809.58x = 12,178,739,776.59
5. Step 5: Solve for x
   x = 12,178,739,776.59/120,809.58
6. Step 6: Final answer
   x = 100,809.39