Finding the Fourth Proportional to 120,499.63, 166,289.48 and 72,764.71

Step by Step Solution

1. Step 1: Write the proportion equation
   120,499.63 : 166,289.48 = 72,764.71 : x
2. Step 2: Convert to fraction form
   120,499.63/166,289.48 = 72,764.71/x
3. Step 3: Cross multiply
   120,499.63x = 166,289.48 × 72,764.71
4. Step 4: Simplify right side
   120,499.63x = 12,100,005,788.25
5. Step 5: Solve for x
   x = 12,100,005,788.25/120,499.63
6. Step 6: Final answer
   x = 100,415.29