Finding the Fourth Proportional to 52,784.10, 72,842.43 and 28,911.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,784.10 : 72,842.43 = 28,911.78 : x
2. Step 2: Convert to fraction form
   52,784.10/72,842.43 = 28,911.78/x
3. Step 3: Cross multiply
   52,784.10x = 72,842.43 × 28,911.78
4. Step 4: Simplify right side
   52,784.10x = 2,106,004,310.83
5. Step 5: Solve for x
   x = 2,106,004,310.83/52,784.10
6. Step 6: Final answer
   x = 39,898.46