Finding the Fourth Proportional to 52,780.67, 72,834.54 and 28,906.83

Step by Step Solution

1. Step 1: Write the proportion equation
   52,780.67 : 72,834.54 = 28,906.83 : x
2. Step 2: Convert to fraction form
   52,780.67/72,834.54 = 28,906.83/x
3. Step 3: Cross multiply
   52,780.67x = 72,834.54 × 28,906.83
4. Step 4: Simplify right side
   52,780.67x = 2,105,415,665.91
5. Step 5: Solve for x
   x = 2,105,415,665.91/52,780.67
6. Step 6: Final answer
   x = 39,889.90