Finding the Fourth Proportional to 48,826.31, 67,379.72 and 28,685.03

Step by Step Solution

1. Step 1: Write the proportion equation
   48,826.31 : 67,379.72 = 28,685.03 : x
2. Step 2: Convert to fraction form
   48,826.31/67,379.72 = 28,685.03/x
3. Step 3: Cross multiply
   48,826.31x = 67,379.72 × 28,685.03
4. Step 4: Simplify right side
   48,826.31x = 1,932,788,809.27
5. Step 5: Solve for x
   x = 1,932,788,809.27/48,826.31
6. Step 6: Final answer
   x = 39,584.99