Finding the Fourth Proportional to 120,658.93, 166,513.78 and 72,903.06

Step by Step Solution

1. Step 1: Write the proportion equation
   120,658.93 : 166,513.78 = 72,903.06 : x
2. Step 2: Convert to fraction form
   120,658.93/166,513.78 = 72,903.06/x
3. Step 3: Cross multiply
   120,658.93x = 166,513.78 × 72,903.06
4. Step 4: Simplify right side
   120,658.93x = 12,139,364,094.17
5. Step 5: Solve for x
   x = 12,139,364,094.17/120,658.93
6. Step 6: Final answer
   x = 100,608.92