Finding the Fourth Proportional to 112,986.05, 155,919.38 and 65,238.36

Step by Step Solution

1. Step 1: Write the proportion equation
   112,986.05 : 155,919.38 = 65,238.36 : x
2. Step 2: Convert to fraction form
   112,986.05/155,919.38 = 65,238.36/x
3. Step 3: Cross multiply
   112,986.05x = 155,919.38 × 65,238.36
4. Step 4: Simplify right side
   112,986.05x = 10,171,924,317.23
5. Step 5: Solve for x
   x = 10,171,924,317.23/112,986.05
6. Step 6: Final answer
   x = 90,028.15