Finding the Fourth Proportional to 119,142.09, 164,420.28 and 65,428.56

Step by Step Solution

1. Step 1: Write the proportion equation
   119,142.09 : 164,420.28 = 65,428.56 : x
2. Step 2: Convert to fraction form
   119,142.09/164,420.28 = 65,428.56/x
3. Step 3: Cross multiply
   119,142.09x = 164,420.28 × 65,428.56
4. Step 4: Simplify right side
   119,142.09x = 10,757,782,155.20
5. Step 5: Solve for x
   x = 10,757,782,155.20/119,142.09
6. Step 6: Final answer
   x = 90,293.72