Finding the Fourth Proportional to 7,131.17, 10,692.20 and 2,974.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.17 : 10,692.20 = 2,974.05 : x
2. Step 2: Convert to fraction form
   7,131.17/10,692.20 = 2,974.05/x
3. Step 3: Cross multiply
   7,131.17x = 10,692.20 × 2,974.05
4. Step 4: Simplify right side
   7,131.17x = 31,799,144.85
5. Step 5: Solve for x
   x = 31,799,144.85/7,131.17
6. Step 6: Final answer
   x = 4,459.17