Finding the Fourth Proportional to 100,866.01, 139,148.32 and 65,067.55

Step by Step Solution

1. Step 1: Write the proportion equation
   100,866.01 : 139,148.32 = 65,067.55 : x
2. Step 2: Convert to fraction form
   100,866.01/139,148.32 = 65,067.55/x
3. Step 3: Cross multiply
   100,866.01x = 139,148.32 × 65,067.55
4. Step 4: Simplify right side
   100,866.01x = 9,054,040,269.02
5. Step 5: Solve for x
   x = 9,054,040,269.02/100,866.01
6. Step 6: Final answer
   x = 89,763.05