Finding the Fourth Proportional to 2,142.59, 3,213.98 and 1,047.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.59 : 3,213.98 = 1,047.88 : x
2. Step 2: Convert to fraction form
   2,142.59/3,213.98 = 1,047.88/x
3. Step 3: Cross multiply
   2,142.59x = 3,213.98 × 1,047.88
4. Step 4: Simplify right side
   2,142.59x = 3,367,865.36
5. Step 5: Solve for x
   x = 3,367,865.36/2,142.59
6. Step 6: Final answer
   x = 1,571.87