Finding the Fourth Proportional to 3,619.72, 5,424.72 and 1,973.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,619.72 : 5,424.72 = 1,973.80 : x
2. Step 2: Convert to fraction form
   3,619.72/5,424.72 = 1,973.80/x
3. Step 3: Cross multiply
   3,619.72x = 5,424.72 × 1,973.80
4. Step 4: Simplify right side
   3,619.72x = 10,707,312.34
5. Step 5: Solve for x
   x = 10,707,312.34/3,619.72
6. Step 6: Final answer
   x = 2,958.05