Finding the Fourth Proportional to 17,147.37, 23,671.46 and 12,900.05

Step by Step Solution

1. Step 1: Write the proportion equation
   17,147.37 : 23,671.46 = 12,900.05 : x
2. Step 2: Convert to fraction form
   17,147.37/23,671.46 = 12,900.05/x
3. Step 3: Cross multiply
   17,147.37x = 23,671.46 × 12,900.05
4. Step 4: Simplify right side
   17,147.37x = 305,362,834.72
5. Step 5: Solve for x
   x = 305,362,834.72/17,147.37
6. Step 6: Final answer
   x = 17,808.14