Finding the Fourth Proportional to 2,072.40, 3,105.96 and 974.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.40 : 3,105.96 = 974.34 : x
2. Step 2: Convert to fraction form
   2,072.40/3,105.96 = 974.34/x
3. Step 3: Cross multiply
   2,072.40x = 3,105.96 × 974.34
4. Step 4: Simplify right side
   2,072.40x = 3,026,261.07
5. Step 5: Solve for x
   x = 3,026,261.07/2,072.40
6. Step 6: Final answer
   x = 1,460.27