Finding the Fourth Proportional to 87,667.31, 120,974.81 and 49,428.22

Step by Step Solution

1. Step 1: Write the proportion equation
   87,667.31 : 120,974.81 = 49,428.22 : x
2. Step 2: Convert to fraction form
   87,667.31/120,974.81 = 49,428.22/x
3. Step 3: Cross multiply
   87,667.31x = 120,974.81 × 49,428.22
4. Step 4: Simplify right side
   87,667.31x = 5,979,569,523.14
5. Step 5: Solve for x
   x = 5,979,569,523.14/87,667.31
6. Step 6: Final answer
   x = 68,207.52