Finding the Fourth Proportional to 2,978.69, 4,460.30 and 2,891.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.69 : 4,460.30 = 2,891.02 : x
2. Step 2: Convert to fraction form
   2,978.69/4,460.30 = 2,891.02/x
3. Step 3: Cross multiply
   2,978.69x = 4,460.30 × 2,891.02
4. Step 4: Simplify right side
   2,978.69x = 12,894,809.76
5. Step 5: Solve for x
   x = 12,894,809.76/2,978.69
6. Step 6: Final answer
   x = 4,329.03