Finding the Fourth Proportional to 22,915.02, 31,619.52 and 12,842.67

Step by Step Solution

1. Step 1: Write the proportion equation
   22,915.02 : 31,619.52 = 12,842.67 : x
2. Step 2: Convert to fraction form
   22,915.02/31,619.52 = 12,842.67/x
3. Step 3: Cross multiply
   22,915.02x = 31,619.52 × 12,842.67
4. Step 4: Simplify right side
   22,915.02x = 406,079,060.92
5. Step 5: Solve for x
   x = 406,079,060.92/22,915.02
6. Step 6: Final answer
   x = 17,721.09