Finding the Fourth Proportional to 1,978.61, 2,965.89 and 1,004.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.61 : 2,965.89 = 1,004.18 : x
2. Step 2: Convert to fraction form
   1,978.61/2,965.89 = 1,004.18/x
3. Step 3: Cross multiply
   1,978.61x = 2,965.89 × 1,004.18
4. Step 4: Simplify right side
   1,978.61x = 2,978,287.42
5. Step 5: Solve for x
   x = 2,978,287.42/1,978.61
6. Step 6: Final answer
   x = 1,505.24