Finding the Fourth Proportional to 31,978.64, 44,130.81 and 17,639.03

Step by Step Solution

1. Step 1: Write the proportion equation
   31,978.64 : 44,130.81 = 17,639.03 : x
2. Step 2: Convert to fraction form
   31,978.64/44,130.81 = 17,639.03/x
3. Step 3: Cross multiply
   31,978.64x = 44,130.81 × 17,639.03
4. Step 4: Simplify right side
   31,978.64x = 778,424,460.86
5. Step 5: Solve for x
   x = 778,424,460.86/31,978.64
6. Step 6: Final answer
   x = 24,342.01