Finding the Fourth Proportional to 1,978.42, 2,733.78 and 1,417.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.42 : 2,733.78 = 1,417.96 : x
2. Step 2: Convert to fraction form
   1,978.42/2,733.78 = 1,417.96/x
3. Step 3: Cross multiply
   1,978.42x = 2,733.78 × 1,417.96
4. Step 4: Simplify right side
   1,978.42x = 3,876,390.69
5. Step 5: Solve for x
   x = 3,876,390.69/1,978.42
6. Step 6: Final answer
   x = 1,959.34