Finding the Fourth Proportional to 43,126.40, 64,667.72 and 19,732.79

Step by Step Solution

1. Step 1: Write the proportion equation
   43,126.40 : 64,667.72 = 19,732.79 : x
2. Step 2: Convert to fraction form
   43,126.40/64,667.72 = 19,732.79/x
3. Step 3: Cross multiply
   43,126.40x = 64,667.72 × 19,732.79
4. Step 4: Simplify right side
   43,126.40x = 1,276,074,116.54
5. Step 5: Solve for x
   x = 1,276,074,116.54/43,126.40
6. Step 6: Final answer
   x = 29,589.17