Finding the Fourth Proportional to 1,903.17, 2,850.71 and 1,242.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,903.17 : 2,850.71 = 1,242.71 : x
2. Step 2: Convert to fraction form
   1,903.17/2,850.71 = 1,242.71/x
3. Step 3: Cross multiply
   1,903.17x = 2,850.71 × 1,242.71
4. Step 4: Simplify right side
   1,903.17x = 3,542,605.82
5. Step 5: Solve for x
   x = 3,542,605.82/1,903.17
6. Step 6: Final answer
   x = 1,861.42