Finding the Fourth Proportional to 2,978.28, 4,465.08 and 1,129.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.28 : 4,465.08 = 1,129.32 : x
2. Step 2: Convert to fraction form
   2,978.28/4,465.08 = 1,129.32/x
3. Step 3: Cross multiply
   2,978.28x = 4,465.08 × 1,129.32
4. Step 4: Simplify right side
   2,978.28x = 5,042,504.15
5. Step 5: Solve for x
   x = 5,042,504.15/2,978.28
6. Step 6: Final answer
   x = 1,693.09