Finding the Fourth Proportional to 31,978.64, 44,153.16 and 20,046.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,978.64 : 44,153.16 = 20,046.80 : x
2. Step 2: Convert to fraction form
   31,978.64/44,153.16 = 20,046.80/x
3. Step 3: Cross multiply
   31,978.64x = 44,153.16 × 20,046.80
4. Step 4: Simplify right side
   31,978.64x = 885,129,567.89
5. Step 5: Solve for x
   x = 885,129,567.89/31,978.64
6. Step 6: Final answer
   x = 27,678.77