Finding the Fourth Proportional to 3,709.92, 5,560.56 and 1,978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,709.92 : 5,560.56 = 1,978.08 : x
2. Step 2: Convert to fraction form
   3,709.92/5,560.56 = 1,978.08/x
3. Step 3: Cross multiply
   3,709.92x = 5,560.56 × 1,978.08
4. Step 4: Simplify right side
   3,709.92x = 10,999,232.52
5. Step 5: Solve for x
   x = 10,999,232.52/3,709.92
6. Step 6: Final answer
   x = 2,964.82