Finding the Fourth Proportional to 2,071.72, 2,859.78 and 1,372.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.72 : 2,859.78 = 1,372.84 : x
2. Step 2: Convert to fraction form
   2,071.72/2,859.78 = 1,372.84/x
3. Step 3: Cross multiply
   2,071.72x = 2,859.78 × 1,372.84
4. Step 4: Simplify right side
   2,071.72x = 3,926,020.38
5. Step 5: Solve for x
   x = 3,926,020.38/2,071.72
6. Step 6: Final answer
   x = 1,895.05