Finding the Fourth Proportional to 120,852.47, 181,106.84 and 89,012.18

Step by Step Solution

1. Step 1: Write the proportion equation
   120,852.47 : 181,106.84 = 89,012.18 : x
2. Step 2: Convert to fraction form
   120,852.47/181,106.84 = 89,012.18/x
3. Step 3: Cross multiply
   120,852.47x = 181,106.84 × 89,012.18
4. Step 4: Simplify right side
   120,852.47x = 16,120,713,290.72
5. Step 5: Solve for x
   x = 16,120,713,290.72/120,852.47
6. Step 6: Final answer
   x = 133,391.68