Finding the Fourth Proportional to 119,121.50, 164,386.51 and 65,406.04

Step by Step Solution

1. Step 1: Write the proportion equation
   119,121.50 : 164,386.51 = 65,406.04 : x
2. Step 2: Convert to fraction form
   119,121.50/164,386.51 = 65,406.04/x
3. Step 3: Cross multiply
   119,121.50x = 164,386.51 × 65,406.04
4. Step 4: Simplify right side
   119,121.50x = 10,751,870,648.52
5. Step 5: Solve for x
   x = 10,751,870,648.52/119,121.50
6. Step 6: Final answer
   x = 90,259.70