Finding the Fourth Proportional to 43,439, 65,128.62 and 17,146.76

Step by Step Solution

1. Step 1: Write the proportion equation
   43,439 : 65,128.62 = 17,146.76 : x
2. Step 2: Convert to fraction form
   43,439/65,128.62 = 17,146.76/x
3. Step 3: Cross multiply
   43,439x = 65,128.62 × 17,146.76
4. Step 4: Simplify right side
   43,439x = 1,116,744,816.27
5. Step 5: Solve for x
   x = 1,116,744,816.27/43,439
6. Step 6: Final answer
   x = 25,708.35