Finding the Fourth Proportional to 31,032.06, 42,824.42 and 16,885

Step by Step Solution

1. Step 1: Write the proportion equation
   31,032.06 : 42,824.42 = 16,885 : x
2. Step 2: Convert to fraction form
   31,032.06/42,824.42 = 16,885/x
3. Step 3: Cross multiply
   31,032.06x = 42,824.42 × 16,885
4. Step 4: Simplify right side
   31,032.06x = 723,090,331.70
5. Step 5: Solve for x
   x = 723,090,331.70/31,032.06
6. Step 6: Final answer
   x = 23,301.40