Finding the Fourth Proportional to 55,278.72, 76,284.72 and 31,405.44

Step by Step Solution

1. Step 1: Write the proportion equation
   55,278.72 : 76,284.72 = 31,405.44 : x
2. Step 2: Convert to fraction form
   55,278.72/76,284.72 = 31,405.44/x
3. Step 3: Cross multiply
   55,278.72x = 76,284.72 × 31,405.44
4. Step 4: Simplify right side
   55,278.72x = 2,395,755,196.88
5. Step 5: Solve for x
   x = 2,395,755,196.88/55,278.72
6. Step 6: Final answer
   x = 43,339.56