Finding the Fourth Proportional to 12,808.72, 17,656.68 and 10,009.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,808.72 : 17,656.68 = 10,009.36 : x
2. Step 2: Convert to fraction form
   12,808.72/17,656.68 = 10,009.36/x
3. Step 3: Cross multiply
   12,808.72x = 17,656.68 × 10,009.36
4. Step 4: Simplify right side
   12,808.72x = 176,732,066.52
5. Step 5: Solve for x
   x = 176,732,066.52/12,808.72
6. Step 6: Final answer
   x = 13,797.79