Finding the Fourth Proportional to 1,978.67, 2,729.88 and 1,270.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.67 : 2,729.88 = 1,270.46 : x
2. Step 2: Convert to fraction form
   1,978.67/2,729.88 = 1,270.46/x
3. Step 3: Cross multiply
   1,978.67x = 2,729.88 × 1,270.46
4. Step 4: Simplify right side
   1,978.67x = 3,468,210.17
5. Step 5: Solve for x
   x = 3,468,210.17/1,978.67
6. Step 6: Final answer
   x = 1,752.80