Finding the Fourth Proportional to 3,109.34, 4,290.90 and 1,712.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.34 : 4,290.90 = 1,712.10 : x
2. Step 2: Convert to fraction form
   3,109.34/4,290.90 = 1,712.10/x
3. Step 3: Cross multiply
   3,109.34x = 4,290.90 × 1,712.10
4. Step 4: Simplify right side
   3,109.34x = 7,346,449.89
5. Step 5: Solve for x
   x = 7,346,449.89/3,109.34
6. Step 6: Final answer
   x = 2,362.70