Finding the Fourth Proportional to 1,390.03, 1,917.74 and 1,141.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390.03 : 1,917.74 = 1,141.29 : x
2. Step 2: Convert to fraction form
   1,390.03/1,917.74 = 1,141.29/x
3. Step 3: Cross multiply
   1,390.03x = 1,917.74 × 1,141.29
4. Step 4: Simplify right side
   1,390.03x = 2,188,700.34
5. Step 5: Solve for x
   x = 2,188,700.34/1,390.03
6. Step 6: Final answer
   x = 1,574.57