Finding the Fourth Proportional to 1,978.68, 2,727.18 and 1,535.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.68 : 2,727.18 = 1,535.73 : x
2. Step 2: Convert to fraction form
   1,978.68/2,727.18 = 1,535.73/x
3. Step 3: Cross multiply
   1,978.68x = 2,727.18 × 1,535.73
4. Step 4: Simplify right side
   1,978.68x = 4,188,212.14
5. Step 5: Solve for x
   x = 4,188,212.14/1,978.68
6. Step 6: Final answer
   x = 2,116.67