Finding the Fourth Proportional to 31,016.06, 42,801.72 and 16,868.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.06 : 42,801.72 = 16,868.60 : x
2. Step 2: Convert to fraction form
   31,016.06/42,801.72 = 16,868.60/x
3. Step 3: Cross multiply
   31,016.06x = 42,801.72 × 16,868.60
4. Step 4: Simplify right side
   31,016.06x = 722,005,093.99
5. Step 5: Solve for x
   x = 722,005,093.99/31,016.06
6. Step 6: Final answer
   x = 23,278.43