Finding the Fourth Proportional to 2,978.12, 4,109.87 and 1,651.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.12 : 4,109.87 = 1,651.78 : x
2. Step 2: Convert to fraction form
   2,978.12/4,109.87 = 1,651.78/x
3. Step 3: Cross multiply
   2,978.12x = 4,109.87 × 1,651.78
4. Step 4: Simplify right side
   2,978.12x = 6,788,610.34
5. Step 5: Solve for x
   x = 6,788,610.34/2,978.12
6. Step 6: Final answer
   x = 2,279.49