Finding the Fourth Proportional to 19,459.32, 26,857.86 and 12,661.82

Step by Step Solution

1. Step 1: Write the proportion equation
   19,459.32 : 26,857.86 = 12,661.82 : x
2. Step 2: Convert to fraction form
   19,459.32/26,857.86 = 12,661.82/x
3. Step 3: Cross multiply
   19,459.32x = 26,857.86 × 12,661.82
4. Step 4: Simplify right side
   19,459.32x = 340,069,388.91
5. Step 5: Solve for x
   x = 340,069,388.91/19,459.32
6. Step 6: Final answer
   x = 17,475.91