Finding the Fourth Proportional to 2,070.93, 3,105.72 and 684.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.93 : 3,105.72 = 684.01 : x
2. Step 2: Convert to fraction form
   2,070.93/3,105.72 = 684.01/x
3. Step 3: Cross multiply
   2,070.93x = 3,105.72 × 684.01
4. Step 4: Simplify right side
   2,070.93x = 2,124,343.54
5. Step 5: Solve for x
   x = 2,124,343.54/2,070.93
6. Step 6: Final answer
   x = 1,025.79