Finding the Fourth Proportional to 49,667.82, 74,473.65 and 45,431.21

Step by Step Solution

1. Step 1: Write the proportion equation
   49,667.82 : 74,473.65 = 45,431.21 : x
2. Step 2: Convert to fraction form
   49,667.82/74,473.65 = 45,431.21/x
3. Step 3: Cross multiply
   49,667.82x = 74,473.65 × 45,431.21
4. Step 4: Simplify right side
   49,667.82x = 3,383,427,660.25
5. Step 5: Solve for x
   x = 3,383,427,660.25/49,667.82
6. Step 6: Final answer
   x = 68,121.12