Finding the Fourth Proportional to 48,705.28, 67,212.72 and 28,558

Step by Step Solution

1. Step 1: Write the proportion equation
   48,705.28 : 67,212.72 = 28,558 : x
2. Step 2: Convert to fraction form
   48,705.28/67,212.72 = 28,558/x
3. Step 3: Cross multiply
   48,705.28x = 67,212.72 × 28,558
4. Step 4: Simplify right side
   48,705.28x = 1,919,460,857.76
5. Step 5: Solve for x
   x = 1,919,460,857.76/48,705.28
6. Step 6: Final answer
   x = 39,409.71