Finding the Fourth Proportional to 121,901.72, 182,786.83 and 55,305.51

Step by Step Solution

1. Step 1: Write the proportion equation
   121,901.72 : 182,786.83 = 55,305.51 : x
2. Step 2: Convert to fraction form
   121,901.72/182,786.83 = 55,305.51/x
3. Step 3: Cross multiply
   121,901.72x = 182,786.83 × 55,305.51
4. Step 4: Simplify right side
   121,901.72x = 10,109,118,854.43
5. Step 5: Solve for x
   x = 10,109,118,854.43/121,901.72
6. Step 6: Final answer
   x = 82,928.43