Finding the Fourth Proportional to 85,636.98, 118,291.98 and 65,739.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,636.98 : 118,291.98 = 65,739.72 : x
2. Step 2: Convert to fraction form
   85,636.98/118,291.98 = 65,739.72/x
3. Step 3: Cross multiply
   85,636.98x = 118,291.98 × 65,739.72
4. Step 4: Simplify right side
   85,636.98x = 7,776,481,643.45
5. Step 5: Solve for x
   x = 7,776,481,643.45/85,636.98
6. Step 6: Final answer
   x = 90,807.52