Finding the Fourth Proportional to 2,158.11, 2,978.15 and 1,274.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.11 : 2,978.15 = 1,274.00 : x
2. Step 2: Convert to fraction form
   2,158.11/2,978.15 = 1,274.00/x
3. Step 3: Cross multiply
   2,158.11x = 2,978.15 × 1,274.00
4. Step 4: Simplify right side
   2,158.11x = 3,794,141.84
5. Step 5: Solve for x
   x = 3,794,141.84/2,158.11
6. Step 6: Final answer
   x = 1,758.09