Finding the Fourth Proportional to 12,623.90, 17,437.42 and 10,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,623.90 : 17,437.42 = 10,242.72 : x
2. Step 2: Convert to fraction form
   12,623.90/17,437.42 = 10,242.72/x
3. Step 3: Cross multiply
   12,623.90x = 17,437.42 × 10,242.72
4. Step 4: Simplify right side
   12,623.90x = 178,606,610.58
5. Step 5: Solve for x
   x = 178,606,610.58/12,623.90
6. Step 6: Final answer
   x = 14,148.29