Finding the Fourth Proportional to 2,086.42, 3,127.81 and 1,970.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.42 : 3,127.81 = 1,970.39 : x
2. Step 2: Convert to fraction form
   2,086.42/3,127.81 = 1,970.39/x
3. Step 3: Cross multiply
   2,086.42x = 3,127.81 × 1,970.39
4. Step 4: Simplify right side
   2,086.42x = 6,163,005.55
5. Step 5: Solve for x
   x = 6,163,005.55/2,086.42
6. Step 6: Final answer
   x = 2,953.87