Finding the Fourth Proportional to 55,150.37, 76,109.20 and 31,278.05

Step by Step Solution

1. Step 1: Write the proportion equation
   55,150.37 : 76,109.20 = 31,278.05 : x
2. Step 2: Convert to fraction form
   55,150.37/76,109.20 = 31,278.05/x
3. Step 3: Cross multiply
   55,150.37x = 76,109.20 × 31,278.05
4. Step 4: Simplify right side
   55,150.37x = 2,380,546,982.51
5. Step 5: Solve for x
   x = 2,380,546,982.51/55,150.37
6. Step 6: Final answer
   x = 43,164.66