Finding the Fourth Proportional to 2,978.78, 4,121.24 and 2,926.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.78 : 4,121.24 = 2,926.40 : x
2. Step 2: Convert to fraction form
   2,978.78/4,121.24 = 2,926.40/x
3. Step 3: Cross multiply
   2,978.78x = 4,121.24 × 2,926.40
4. Step 4: Simplify right side
   2,978.78x = 12,060,361.50
5. Step 5: Solve for x
   x = 12,060,361.50/2,978.78
6. Step 6: Final answer
   x = 4,048.77