Finding the Fourth Proportional to 31,068.12, 42,873 and 16,920.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.12 : 42,873 = 16,920.84 : x
2. Step 2: Convert to fraction form
   31,068.12/42,873 = 16,920.84/x
3. Step 3: Cross multiply
   31,068.12x = 42,873 × 16,920.84
4. Step 4: Simplify right side
   31,068.12x = 725,447,173.32
5. Step 5: Solve for x
   x = 725,447,173.32/31,068.12
6. Step 6: Final answer
   x = 23,350.21