Finding the Fourth Proportional to 3,715.61, 5,131.01 and 2,391.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.61 : 5,131.01 = 2,391.62 : x
2. Step 2: Convert to fraction form
   3,715.61/5,131.01 = 2,391.62/x
3. Step 3: Cross multiply
   3,715.61x = 5,131.01 × 2,391.62
4. Step 4: Simplify right side
   3,715.61x = 12,271,406.46
5. Step 5: Solve for x
   x = 12,271,406.46/3,715.61
6. Step 6: Final answer
   x = 3,302.66