Finding the Fourth Proportional to 4,993.32, 6,890.72 and 2,978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   4,993.32 : 6,890.72 = 2,978.12 : x
2. Step 2: Convert to fraction form
   4,993.32/6,890.72 = 2,978.12/x
3. Step 3: Cross multiply
   4,993.32x = 6,890.72 × 2,978.12
4. Step 4: Simplify right side
   4,993.32x = 20,521,391.05
5. Step 5: Solve for x
   x = 20,521,391.05/4,993.32
6. Step 6: Final answer
   x = 4,109.77