Finding the Fourth Proportional to 55,667.45, 76,776.46 and 48,938.78

Step by Step Solution

1. Step 1: Write the proportion equation
   55,667.45 : 76,776.46 = 48,938.78 : x
2. Step 2: Convert to fraction form
   55,667.45/76,776.46 = 48,938.78/x
3. Step 3: Cross multiply
   55,667.45x = 76,776.46 × 48,938.78
4. Step 4: Simplify right side
   55,667.45x = 3,757,346,354.71
5. Step 5: Solve for x
   x = 3,757,346,354.71/55,667.45
6. Step 6: Final answer
   x = 67,496.29