Finding the Fourth Proportional to 2,071.55, 3,106.52 and 684.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.55 : 3,106.52 = 684.51 : x
2. Step 2: Convert to fraction form
   2,071.55/3,106.52 = 684.51/x
3. Step 3: Cross multiply
   2,071.55x = 3,106.52 × 684.51
4. Step 4: Simplify right side
   2,071.55x = 2,126,453.48
5. Step 5: Solve for x
   x = 2,126,453.48/2,071.55
6. Step 6: Final answer
   x = 1,026.50