Finding the Fourth Proportional to 52,789.40, 72,848.67 and 28,916.09

Step by Step Solution

1. Step 1: Write the proportion equation
   52,789.40 : 72,848.67 = 28,916.09 : x
2. Step 2: Convert to fraction form
   52,789.40/72,848.67 = 28,916.09/x
3. Step 3: Cross multiply
   52,789.40x = 72,848.67 × 28,916.09
4. Step 4: Simplify right side
   52,789.40x = 2,106,498,498.60
5. Step 5: Solve for x
   x = 2,106,498,498.60/52,789.40
6. Step 6: Final answer
   x = 39,903.82