Finding the Fourth Proportional to 1,571.90, 2,168.78 and 942.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.90 : 2,168.78 = 942.14 : x
2. Step 2: Convert to fraction form
   1,571.90/2,168.78 = 942.14/x
3. Step 3: Cross multiply
   1,571.90x = 2,168.78 × 942.14
4. Step 4: Simplify right side
   1,571.90x = 2,043,294.39
5. Step 5: Solve for x
   x = 2,043,294.39/1,571.90
6. Step 6: Final answer
   x = 1,299.89