Finding the Fourth Proportional to 14,862.72, 20,498.72 and 12,631.98

Step by Step Solution

1. Step 1: Write the proportion equation
   14,862.72 : 20,498.72 = 12,631.98 : x
2. Step 2: Convert to fraction form
   14,862.72/20,498.72 = 12,631.98/x
3. Step 3: Cross multiply
   14,862.72x = 20,498.72 × 12,631.98
4. Step 4: Simplify right side
   14,862.72x = 258,939,421.07
5. Step 5: Solve for x
   x = 258,939,421.07/14,862.72
6. Step 6: Final answer
   x = 17,422.07