Finding the Fourth Proportional to 22,982.58, 31,715.90 and 12,911.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,982.58 : 31,715.90 = 12,911.30 : x
2. Step 2: Convert to fraction form
   22,982.58/31,715.90 = 12,911.30/x
3. Step 3: Cross multiply
   22,982.58x = 31,715.90 × 12,911.30
4. Step 4: Simplify right side
   22,982.58x = 409,493,499.67
5. Step 5: Solve for x
   x = 409,493,499.67/22,982.58
6. Step 6: Final answer
   x = 17,817.56