Finding the Fourth Proportional to 3,434.42, 5,139.31 and 2,973.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,434.42 : 5,139.31 = 2,973.78 : x
2. Step 2: Convert to fraction form
   3,434.42/5,139.31 = 2,973.78/x
3. Step 3: Cross multiply
   3,434.42x = 5,139.31 × 2,973.78
4. Step 4: Simplify right side
   3,434.42x = 15,283,177.29
5. Step 5: Solve for x
   x = 15,283,177.29/3,434.42
6. Step 6: Final answer
   x = 4,450.00