Finding the Fourth Proportional to 52,778.56, 72,834.42 and 28,906.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,778.56 : 72,834.42 = 28,906.10 : x
2. Step 2: Convert to fraction form
   52,778.56/72,834.42 = 28,906.10/x
3. Step 3: Cross multiply
   52,778.56x = 72,834.42 × 28,906.10
4. Step 4: Simplify right side
   52,778.56x = 2,105,359,027.96
5. Step 5: Solve for x
   x = 2,105,359,027.96/52,778.56
6. Step 6: Final answer
   x = 39,890.42