Finding the Fourth Proportional to 22,886.51, 31,586.36 and 12,818.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,886.51 : 31,586.36 = 12,818.79 : x
2. Step 2: Convert to fraction form
   22,886.51/31,586.36 = 12,818.79/x
3. Step 3: Cross multiply
   22,886.51x = 31,586.36 × 12,818.79
4. Step 4: Simplify right side
   22,886.51x = 404,898,851.61
5. Step 5: Solve for x
   x = 404,898,851.61/22,886.51
6. Step 6: Final answer
   x = 17,691.60