Finding the Fourth Proportional to 1,521.78, 2,096.67 and 1,142.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.78 : 2,096.67 = 1,142.07 : x
2. Step 2: Convert to fraction form
   1,521.78/2,096.67 = 1,142.07/x
3. Step 3: Cross multiply
   1,521.78x = 2,096.67 × 1,142.07
4. Step 4: Simplify right side
   1,521.78x = 2,394,543.91
5. Step 5: Solve for x
   x = 2,394,543.91/1,521.78
6. Step 6: Final answer
   x = 1,573.52