Finding the Fourth Proportional to 1,372.89, 1,894.76 and 1,057.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.89 : 1,894.76 = 1,057.90 : x
2. Step 2: Convert to fraction form
   1,372.89/1,894.76 = 1,057.90/x
3. Step 3: Cross multiply
   1,372.89x = 1,894.76 × 1,057.90
4. Step 4: Simplify right side
   1,372.89x = 2,004,456.58
5. Step 5: Solve for x
   x = 2,004,456.58/1,372.89
6. Step 6: Final answer
   x = 1,460.03