Finding the Fourth Proportional to 2,142.34, 2,955.90 and 1,345.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.34 : 2,955.90 = 1,345.80 : x
2. Step 2: Convert to fraction form
   2,142.34/2,955.90 = 1,345.80/x
3. Step 3: Cross multiply
   2,142.34x = 2,955.90 × 1,345.80
4. Step 4: Simplify right side
   2,142.34x = 3,978,050.22
5. Step 5: Solve for x
   x = 3,978,050.22/2,142.34
6. Step 6: Final answer
   x = 1,856.87