Finding the Fourth Proportional to 52,779.52, 72,836.56 and 28,905.76

Step by Step Solution

1. Step 1: Write the proportion equation
   52,779.52 : 72,836.56 = 28,905.76 : x
2. Step 2: Convert to fraction form
   52,779.52/72,836.56 = 28,905.76/x
3. Step 3: Cross multiply
   52,779.52x = 72,836.56 × 28,905.76
4. Step 4: Simplify right side
   52,779.52x = 2,105,396,122.59
5. Step 5: Solve for x
   x = 2,105,396,122.59/52,779.52
6. Step 6: Final answer
   x = 39,890.40