Finding the Fourth Proportional to 52,782.05, 72,836.50 and 28,904.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,782.05 : 72,836.50 = 28,904.10 : x
2. Step 2: Convert to fraction form
   52,782.05/72,836.50 = 28,904.10/x
3. Step 3: Cross multiply
   52,782.05x = 72,836.50 × 28,904.10
4. Step 4: Simplify right side
   52,782.05x = 2,105,273,479.65
5. Step 5: Solve for x
   x = 2,105,273,479.65/52,782.05
6. Step 6: Final answer
   x = 39,886.16