Finding the Fourth Proportional to 4,885.50, 7,328.15 and 3,131.36

Step by Step Solution

1. Step 1: Write the proportion equation
   4,885.50 : 7,328.15 = 3,131.36 : x
2. Step 2: Convert to fraction form
   4,885.50/7,328.15 = 3,131.36/x
3. Step 3: Cross multiply
   4,885.50x = 7,328.15 × 3,131.36
4. Step 4: Simplify right side
   4,885.50x = 22,947,075.78
5. Step 5: Solve for x
   x = 22,947,075.78/4,885.50
6. Step 6: Final answer
   x = 4,696.98