Finding the Fourth Proportional to 1,978.29, 2,965.14 and 1,038.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.29 : 2,965.14 = 1,038.69 : x
2. Step 2: Convert to fraction form
   1,978.29/2,965.14 = 1,038.69/x
3. Step 3: Cross multiply
   1,978.29x = 2,965.14 × 1,038.69
4. Step 4: Simplify right side
   1,978.29x = 3,079,861.27
5. Step 5: Solve for x
   x = 3,079,861.27/1,978.29
6. Step 6: Final answer
   x = 1,556.83