Finding the Fourth Proportional to 1,978.83, 2,961.23 and 1,424.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.83 : 2,961.23 = 1,424.12 : x
2. Step 2: Convert to fraction form
   1,978.83/2,961.23 = 1,424.12/x
3. Step 3: Cross multiply
   1,978.83x = 2,961.23 × 1,424.12
4. Step 4: Simplify right side
   1,978.83x = 4,217,124.94
5. Step 5: Solve for x
   x = 4,217,124.94/1,978.83
6. Step 6: Final answer
   x = 2,131.12