Finding the Fourth Proportional to 30,311.31, 41,828.55 and 16,881.87

Step by Step Solution

1. Step 1: Write the proportion equation
   30,311.31 : 41,828.55 = 16,881.87 : x
2. Step 2: Convert to fraction form
   30,311.31/41,828.55 = 16,881.87/x
3. Step 3: Cross multiply
   30,311.31x = 41,828.55 × 16,881.87
4. Step 4: Simplify right side
   30,311.31x = 706,144,096.61
5. Step 5: Solve for x
   x = 706,144,096.61/30,311.31
6. Step 6: Final answer
   x = 23,296.39