Finding the Fourth Proportional to 2,978.39, 4,468.21 and 1,129.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.39 : 4,468.21 = 1,129.16 : x
2. Step 2: Convert to fraction form
   2,978.39/4,468.21 = 1,129.16/x
3. Step 3: Cross multiply
   2,978.39x = 4,468.21 × 1,129.16
4. Step 4: Simplify right side
   2,978.39x = 5,045,332.35
5. Step 5: Solve for x
   x = 5,045,332.35/2,978.39
6. Step 6: Final answer
   x = 1,693.98