Finding the Fourth Proportional to 12,377.50, 17,081.85 and 7,072.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,377.50 : 17,081.85 = 7,072.20 : x
2. Step 2: Convert to fraction form
   12,377.50/17,081.85 = 7,072.20/x
3. Step 3: Cross multiply
   12,377.50x = 17,081.85 × 7,072.20
4. Step 4: Simplify right side
   12,377.50x = 120,806,259.57
5. Step 5: Solve for x
   x = 120,806,259.57/12,377.50
6. Step 6: Final answer
   x = 9,760.15