Finding the Fourth Proportional to 52,780.86, 72,839.33 and 28,908.84

Step by Step Solution

1. Step 1: Write the proportion equation
   52,780.86 : 72,839.33 = 28,908.84 : x
2. Step 2: Convert to fraction form
   52,780.86/72,839.33 = 28,908.84/x
3. Step 3: Cross multiply
   52,780.86x = 72,839.33 × 28,908.84
4. Step 4: Simplify right side
   52,780.86x = 2,105,700,392.13
5. Step 5: Solve for x
   x = 2,105,700,392.13/52,780.86
6. Step 6: Final answer
   x = 39,895.15