Finding the Fourth Proportional to 2,076.86, 2,871.48 and 1,985.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.86 : 2,871.48 = 1,985.06 : x
2. Step 2: Convert to fraction form
   2,076.86/2,871.48 = 1,985.06/x
3. Step 3: Cross multiply
   2,076.86x = 2,871.48 × 1,985.06
4. Step 4: Simplify right side
   2,076.86x = 5,700,060.09
5. Step 5: Solve for x
   x = 5,700,060.09/2,076.86
6. Step 6: Final answer
   x = 2,744.56