Finding the Fourth Proportional to 1,379.40, 1,900.98 and 1,142.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.40 : 1,900.98 = 1,142.52 : x
2. Step 2: Convert to fraction form
   1,379.40/1,900.98 = 1,142.52/x
3. Step 3: Cross multiply
   1,379.40x = 1,900.98 × 1,142.52
4. Step 4: Simplify right side
   1,379.40x = 2,171,907.67
5. Step 5: Solve for x
   x = 2,171,907.67/1,379.40
6. Step 6: Final answer
   x = 1,574.53