Finding the Fourth Proportional to 153,608.94, 211,984.83 and 89,940.78

Step by Step Solution

1. Step 1: Write the proportion equation
   153,608.94 : 211,984.83 = 89,940.78 : x
2. Step 2: Convert to fraction form
   153,608.94/211,984.83 = 89,940.78/x
3. Step 3: Cross multiply
   153,608.94x = 211,984.83 × 89,940.78
4. Step 4: Simplify right side
   153,608.94x = 19,066,080,958.37
5. Step 5: Solve for x
   x = 19,066,080,958.37/153,608.94
6. Step 6: Final answer
   x = 124,120.91