Finding the Fourth Proportional to 2,072.34, 2,857.95 and 1,372.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.34 : 2,857.95 = 1,372.50 : x
2. Step 2: Convert to fraction form
   2,072.34/2,857.95 = 1,372.50/x
3. Step 3: Cross multiply
   2,072.34x = 2,857.95 × 1,372.50
4. Step 4: Simplify right side
   2,072.34x = 3,922,536.38
5. Step 5: Solve for x
   x = 3,922,536.38/2,072.34
6. Step 6: Final answer
   x = 1,892.81