Finding the Fourth Proportional to 31,028.74, 42,819.86 and 16,881.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,028.74 : 42,819.86 = 16,881.69 : x
2. Step 2: Convert to fraction form
   31,028.74/42,819.86 = 16,881.69/x
3. Step 3: Cross multiply
   31,028.74x = 42,819.86 × 16,881.69
4. Step 4: Simplify right side
   31,028.74x = 722,871,602.36
5. Step 5: Solve for x
   x = 722,871,602.36/31,028.74
6. Step 6: Final answer
   x = 23,296.84