Finding the Fourth Proportional to 12,807.12, 17,698.32 and 10,448.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.12 : 17,698.32 = 10,448.40 : x
2. Step 2: Convert to fraction form
   12,807.12/17,698.32 = 10,448.40/x
3. Step 3: Cross multiply
   12,807.12x = 17,698.32 × 10,448.40
4. Step 4: Simplify right side
   12,807.12x = 184,919,126.69
5. Step 5: Solve for x
   x = 184,919,126.69/12,807.12
6. Step 6: Final answer
   x = 14,438.78