Finding the Fourth Proportional to 154,976.24, 213,870.84 and 87,908.24

Step by Step Solution

1. Step 1: Write the proportion equation
   154,976.24 : 213,870.84 = 87,908.24 : x
2. Step 2: Convert to fraction form
   154,976.24/213,870.84 = 87,908.24/x
3. Step 3: Cross multiply
   154,976.24x = 213,870.84 × 87,908.24
4. Step 4: Simplify right side
   154,976.24x = 18,801,009,131.72
5. Step 5: Solve for x
   x = 18,801,009,131.72/154,976.24
6. Step 6: Final answer
   x = 121,315.43