Finding the Fourth Proportional to 31,086, 42,898.70 and 16,938.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086 : 42,898.70 = 16,938.84 : x
2. Step 2: Convert to fraction form
   31,086/42,898.70 = 16,938.84/x
3. Step 3: Cross multiply
   31,086x = 42,898.70 × 16,938.84
4. Step 4: Simplify right side
   31,086x = 726,654,215.51
5. Step 5: Solve for x
   x = 726,654,215.51/31,086
6. Step 6: Final answer
   x = 23,375.61