Finding the Fourth Proportional to 82,311.31, 123,467.10 and 19,981.81

Step by Step Solution

1. Step 1: Write the proportion equation
   82,311.31 : 123,467.10 = 19,981.81 : x
2. Step 2: Convert to fraction form
   82,311.31/123,467.10 = 19,981.81/x
3. Step 3: Cross multiply
   82,311.31x = 123,467.10 × 19,981.81
4. Step 4: Simplify right side
   82,311.31x = 2,467,096,133.45
5. Step 5: Solve for x
   x = 2,467,096,133.45/82,311.31
6. Step 6: Final answer
   x = 29,972.75