Finding the Fourth Proportional to 55,640.75, 76,784.27 and 30,490.25

Step by Step Solution

1. Step 1: Write the proportion equation
   55,640.75 : 76,784.27 = 30,490.25 : x
2. Step 2: Convert to fraction form
   55,640.75/76,784.27 = 30,490.25/x
3. Step 3: Cross multiply
   55,640.75x = 76,784.27 × 30,490.25
4. Step 4: Simplify right side
   55,640.75x = 2,341,171,588.37
5. Step 5: Solve for x
   x = 2,341,171,588.37/55,640.75
6. Step 6: Final answer
   x = 42,076.56