Finding the Fourth Proportional to 55,019.54, 75,928.79 and 31,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,019.54 : 75,928.79 = 31,145.72 : x
2. Step 2: Convert to fraction form
   55,019.54/75,928.79 = 31,145.72/x
3. Step 3: Cross multiply
   55,019.54x = 75,928.79 × 31,145.72
4. Step 4: Simplify right side
   55,019.54x = 2,364,856,833.28
5. Step 5: Solve for x
   x = 2,364,856,833.28/55,019.54
6. Step 6: Final answer
   x = 42,982.13