Finding the Fourth Proportional to 52,780.29, 72,834.84 and 28,907.16

Step by Step Solution

1. Step 1: Write the proportion equation
   52,780.29 : 72,834.84 = 28,907.16 : x
2. Step 2: Convert to fraction form
   52,780.29/72,834.84 = 28,907.16/x
3. Step 3: Cross multiply
   52,780.29x = 72,834.84 × 28,907.16
4. Step 4: Simplify right side
   52,780.29x = 2,105,448,373.45
5. Step 5: Solve for x
   x = 2,105,448,373.45/52,780.29
6. Step 6: Final answer
   x = 39,890.81