Finding the Fourth Proportional to 55,770.44, 76,667.25 and 47,980.79

Step by Step Solution

1. Step 1: Write the proportion equation
   55,770.44 : 76,667.25 = 47,980.79 : x
2. Step 2: Convert to fraction form
   55,770.44/76,667.25 = 47,980.79/x
3. Step 3: Cross multiply
   55,770.44x = 76,667.25 × 47,980.79
4. Step 4: Simplify right side
   55,770.44x = 3,678,554,598.89
5. Step 5: Solve for x
   x = 3,678,554,598.89/55,770.44
6. Step 6: Final answer
   x = 65,958.86