Finding the Fourth Proportional to 16,390.80, 24,577.56 and 7,146

Step by Step Solution

1. Step 1: Write the proportion equation
   16,390.80 : 24,577.56 = 7,146 : x
2. Step 2: Convert to fraction form
   16,390.80/24,577.56 = 7,146/x
3. Step 3: Cross multiply
   16,390.80x = 24,577.56 × 7,146
4. Step 4: Simplify right side
   16,390.80x = 175,631,243.76
5. Step 5: Solve for x
   x = 175,631,243.76/16,390.80
6. Step 6: Final answer
   x = 10,715.23