Finding the Fourth Proportional to 55,767.38, 76,960.60 and 30,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,767.38 : 76,960.60 = 30,618.50 : x
2. Step 2: Convert to fraction form
   55,767.38/76,960.60 = 30,618.50/x
3. Step 3: Cross multiply
   55,767.38x = 76,960.60 × 30,618.50
4. Step 4: Simplify right side
   55,767.38x = 2,356,417,669.75
5. Step 5: Solve for x
   x = 2,356,417,669.75/55,767.38
6. Step 6: Final answer
   x = 42,254.41