Finding the Fourth Proportional to 72,661.84, 109,013.61 and 30,520.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72,661.84 : 109,013.61 = 30,520.25 : x
2. Step 2: Convert to fraction form
   72,661.84/109,013.61 = 30,520.25/x
3. Step 3: Cross multiply
   72,661.84x = 109,013.61 × 30,520.25
4. Step 4: Simplify right side
   72,661.84x = 3,327,122,478.00
5. Step 5: Solve for x
   x = 3,327,122,478.00/72,661.84
6. Step 6: Final answer
   x = 45,789.13