Finding the Fourth Proportional to 120,648.69, 166,499.64 and 72,892.81

Step by Step Solution

1. Step 1: Write the proportion equation
   120,648.69 : 166,499.64 = 72,892.81 : x
2. Step 2: Convert to fraction form
   120,648.69/166,499.64 = 72,892.81/x
3. Step 3: Cross multiply
   120,648.69x = 166,499.64 × 72,892.81
4. Step 4: Simplify right side
   120,648.69x = 12,136,625,426.63
5. Step 5: Solve for x
   x = 12,136,625,426.63/120,648.69
6. Step 6: Final answer
   x = 100,594.76