Finding the Fourth Proportional to 118,986.56, 164,202.72 and 65,271.68

Step by Step Solution

1. Step 1: Write the proportion equation
   118,986.56 : 164,202.72 = 65,271.68 : x
2. Step 2: Convert to fraction form
   118,986.56/164,202.72 = 65,271.68/x
3. Step 3: Cross multiply
   118,986.56x = 164,202.72 × 65,271.68
4. Step 4: Simplify right side
   118,986.56x = 10,717,787,394.97
5. Step 5: Solve for x
   x = 10,717,787,394.97/118,986.56
6. Step 6: Final answer
   x = 90,075.61