Finding the Fourth Proportional to 1,888.72, 2,605.74 and 1,142.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,888.72 : 2,605.74 = 1,142.14 : x
2. Step 2: Convert to fraction form
   1,888.72/2,605.74 = 1,142.14/x
3. Step 3: Cross multiply
   1,888.72x = 2,605.74 × 1,142.14
4. Step 4: Simplify right side
   1,888.72x = 2,976,119.88
5. Step 5: Solve for x
   x = 2,976,119.88/1,888.72
6. Step 6: Final answer
   x = 1,575.73