Finding the Fourth Proportional to 2,071.17, 3,107.23 and 684.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.17 : 3,107.23 = 684.45 : x
2. Step 2: Convert to fraction form
   2,071.17/3,107.23 = 684.45/x
3. Step 3: Cross multiply
   2,071.17x = 3,107.23 × 684.45
4. Step 4: Simplify right side
   2,071.17x = 2,126,741.86
5. Step 5: Solve for x
   x = 2,126,741.86/2,071.17
6. Step 6: Final answer
   x = 1,026.83