Finding the Fourth Proportional to 55,678.56, 76,836.72 and 30,528.48

Step by Step Solution

1. Step 1: Write the proportion equation
   55,678.56 : 76,836.72 = 30,528.48 : x
2. Step 2: Convert to fraction form
   55,678.56/76,836.72 = 30,528.48/x
3. Step 3: Cross multiply
   55,678.56x = 76,836.72 × 30,528.48
4. Step 4: Simplify right side
   55,678.56x = 2,345,708,269.79
5. Step 5: Solve for x
   x = 2,345,708,269.79/55,678.56
6. Step 6: Final answer
   x = 42,129.47