Finding the Fourth Proportional to 91,901.80, 137,622.30 and 73,469.80

Step by Step Solution

1. Step 1: Write the proportion equation
   91,901.80 : 137,622.30 = 73,469.80 : x
2. Step 2: Convert to fraction form
   91,901.80/137,622.30 = 73,469.80/x
3. Step 3: Cross multiply
   91,901.80x = 137,622.30 × 73,469.80
4. Step 4: Simplify right side
   91,901.80x = 10,111,082,856.54
5. Step 5: Solve for x
   x = 10,111,082,856.54/91,901.80
6. Step 6: Final answer
   x = 110,020.51