Finding the Fourth Proportional to 17,178.51, 25,784.40 and 8,300.09

Step by Step Solution

1. Step 1: Write the proportion equation
   17,178.51 : 25,784.40 = 8,300.09 : x
2. Step 2: Convert to fraction form
   17,178.51/25,784.40 = 8,300.09/x
3. Step 3: Cross multiply
   17,178.51x = 25,784.40 × 8,300.09
4. Step 4: Simplify right side
   17,178.51x = 214,012,753.07
5. Step 5: Solve for x
   x = 214,012,753.07/17,178.51
6. Step 6: Final answer
   x = 12,458.17