Finding the Fourth Proportional to 119,144.56, 164,412 and 65,429.28

Step by Step Solution

1. Step 1: Write the proportion equation
   119,144.56 : 164,412 = 65,429.28 : x
2. Step 2: Convert to fraction form
   119,144.56/164,412 = 65,429.28/x
3. Step 3: Cross multiply
   119,144.56x = 164,412 × 65,429.28
4. Step 4: Simplify right side
   119,144.56x = 10,757,358,783.36
5. Step 5: Solve for x
   x = 10,757,358,783.36/119,144.56
6. Step 6: Final answer
   x = 90,288.29