Finding the Fourth Proportional to 2,978.28, 4,466.12 and 1,312.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.28 : 4,466.12 = 1,312.36 : x
2. Step 2: Convert to fraction form
   2,978.28/4,466.12 = 1,312.36/x
3. Step 3: Cross multiply
   2,978.28x = 4,466.12 × 1,312.36
4. Step 4: Simplify right side
   2,978.28x = 5,861,157.24
5. Step 5: Solve for x
   x = 5,861,157.24/2,978.28
6. Step 6: Final answer
   x = 1,967.97