Finding the Fourth Proportional to 3,978.62, 5,959.80 and 1,892.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.62 : 5,959.80 = 1,892.31 : x
2. Step 2: Convert to fraction form
   3,978.62/5,959.80 = 1,892.31/x
3. Step 3: Cross multiply
   3,978.62x = 5,959.80 × 1,892.31
4. Step 4: Simplify right side
   3,978.62x = 11,277,805.63
5. Step 5: Solve for x
   x = 11,277,805.63/3,978.62
6. Step 6: Final answer
   x = 2,834.60