Finding the Fourth Proportional to 3,971.80, 5,482.74 and 2,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971.80 : 5,482.74 = 2,399.50 : x
2. Step 2: Convert to fraction form
   3,971.80/5,482.74 = 2,399.50/x
3. Step 3: Cross multiply
   3,971.80x = 5,482.74 × 2,399.50
4. Step 4: Simplify right side
   3,971.80x = 13,155,834.63
5. Step 5: Solve for x
   x = 13,155,834.63/3,971.80
6. Step 6: Final answer
   x = 3,312.31