Finding the Fourth Proportional to 52,789.57, 72,849.62 and 28,917.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,789.57 : 72,849.62 = 28,917.10 : x
2. Step 2: Convert to fraction form
   52,789.57/72,849.62 = 28,917.10/x
3. Step 3: Cross multiply
   52,789.57x = 72,849.62 × 28,917.10
4. Step 4: Simplify right side
   52,789.57x = 2,106,599,746.50
5. Step 5: Solve for x
   x = 2,106,599,746.50/52,789.57
6. Step 6: Final answer
   x = 39,905.61