Finding the Fourth Proportional to 50,128.57, 69,172.83 and 28,903.74

Step by Step Solution

1. Step 1: Write the proportion equation
   50,128.57 : 69,172.83 = 28,903.74 : x
2. Step 2: Convert to fraction form
   50,128.57/69,172.83 = 28,903.74/x
3. Step 3: Cross multiply
   50,128.57x = 69,172.83 × 28,903.74
4. Step 4: Simplify right side
   50,128.57x = 1,999,353,179.79
5. Step 5: Solve for x
   x = 1,999,353,179.79/50,128.57
6. Step 6: Final answer
   x = 39,884.50