Finding the Fourth Proportional to 31,028.08, 42,820.50 and 16,880.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,028.08 : 42,820.50 = 16,880.68 : x
2. Step 2: Convert to fraction form
   31,028.08/42,820.50 = 16,880.68/x
3. Step 3: Cross multiply
   31,028.08x = 42,820.50 × 16,880.68
4. Step 4: Simplify right side
   31,028.08x = 722,839,157.94
5. Step 5: Solve for x
   x = 722,839,157.94/31,028.08
6. Step 6: Final answer
   x = 23,296.29