Finding the Fourth Proportional to 90,145.94, 135,238.89 and 33,986.53

Step by Step Solution

1. Step 1: Write the proportion equation
   90,145.94 : 135,238.89 = 33,986.53 : x
2. Step 2: Convert to fraction form
   90,145.94/135,238.89 = 33,986.53/x
3. Step 3: Cross multiply
   90,145.94x = 135,238.89 × 33,986.53
4. Step 4: Simplify right side
   90,145.94x = 4,596,300,888.65
5. Step 5: Solve for x
   x = 4,596,300,888.65/90,145.94
6. Step 6: Final answer
   x = 50,987.33