Finding the Fourth Proportional to 16,704.45, 23,055.10 and 9,990.81

Step by Step Solution

1. Step 1: Write the proportion equation
   16,704.45 : 23,055.10 = 9,990.81 : x
2. Step 2: Convert to fraction form
   16,704.45/23,055.10 = 9,990.81/x
3. Step 3: Cross multiply
   16,704.45x = 23,055.10 × 9,990.81
4. Step 4: Simplify right side
   16,704.45x = 230,339,123.63
5. Step 5: Solve for x
   x = 230,339,123.63/16,704.45
6. Step 6: Final answer
   x = 13,789.09