Finding the Fourth Proportional to 19,507.49, 26,911.49 and 12,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,507.49 : 26,911.49 = 12,429.50 : x
2. Step 2: Convert to fraction form
   19,507.49/26,911.49 = 12,429.50/x
3. Step 3: Cross multiply
   19,507.49x = 26,911.49 × 12,429.50
4. Step 4: Simplify right side
   19,507.49x = 334,496,463.31
5. Step 5: Solve for x
   x = 334,496,463.31/19,507.49
6. Step 6: Final answer
   x = 17,147.08