Finding the Fourth Proportional to 55,307.56, 76,326.22 and 31,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,307.56 : 76,326.22 = 31,112.72 : x
2. Step 2: Convert to fraction form
   55,307.56/76,326.22 = 31,112.72/x
3. Step 3: Cross multiply
   55,307.56x = 76,326.22 × 31,112.72
4. Step 4: Simplify right side
   55,307.56x = 2,374,716,311.52
5. Step 5: Solve for x
   x = 2,374,716,311.52/55,307.56
6. Step 6: Final answer
   x = 42,936.56