Finding the Fourth Proportional to 87,667.81, 120,975.50 and 49,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   87,667.81 : 120,975.50 = 49,428.72 : x
2. Step 2: Convert to fraction form
   87,667.81/120,975.50 = 49,428.72/x
3. Step 3: Cross multiply
   87,667.81x = 120,975.50 × 49,428.72
4. Step 4: Simplify right side
   87,667.81x = 5,979,664,116.36
5. Step 5: Solve for x
   x = 5,979,664,116.36/87,667.81
6. Step 6: Final answer
   x = 68,208.21