Finding the Fourth Proportional to 119,146.64, 164,422.56 and 65,435.12

Step by Step Solution

1. Step 1: Write the proportion equation
   119,146.64 : 164,422.56 = 65,435.12 : x
2. Step 2: Convert to fraction form
   119,146.64/164,422.56 = 65,435.12/x
3. Step 3: Cross multiply
   119,146.64x = 164,422.56 × 65,435.12
4. Step 4: Simplify right side
   119,146.64x = 10,759,009,944.31
5. Step 5: Solve for x
   x = 10,759,009,944.31/119,146.64
6. Step 6: Final answer
   x = 90,300.57