Finding the Fourth Proportional to 3,429.81, 5,139.23 and 1,970.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.81 : 5,139.23 = 1,970.01 : x
2. Step 2: Convert to fraction form
   3,429.81/5,139.23 = 1,970.01/x
3. Step 3: Cross multiply
   3,429.81x = 5,139.23 × 1,970.01
4. Step 4: Simplify right side
   3,429.81x = 10,124,324.64
5. Step 5: Solve for x
   x = 10,124,324.64/3,429.81
6. Step 6: Final answer
   x = 2,951.86