Finding the Fourth Proportional to 3,615.39, 5,421.72 and 1,971.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.39 : 5,421.72 = 1,971.04 : x
2. Step 2: Convert to fraction form
   3,615.39/5,421.72 = 1,971.04/x
3. Step 3: Cross multiply
   3,615.39x = 5,421.72 × 1,971.04
4. Step 4: Simplify right side
   3,615.39x = 10,686,426.37
5. Step 5: Solve for x
   x = 10,686,426.37/3,615.39
6. Step 6: Final answer
   x = 2,955.82