Finding the Fourth Proportional to 120,660.03, 166,486.59 and 72,916.00

Step by Step Solution

1. Step 1: Write the proportion equation
   120,660.03 : 166,486.59 = 72,916.00 : x
2. Step 2: Convert to fraction form
   120,660.03/166,486.59 = 72,916.00/x
3. Step 3: Cross multiply
   120,660.03x = 166,486.59 × 72,916.00
4. Step 4: Simplify right side
   120,660.03x = 12,139,535,780.22
5. Step 5: Solve for x
   x = 12,139,535,780.22/120,660.03
6. Step 6: Final answer
   x = 100,609.42