Finding the Fourth Proportional to 52,782.37, 72,840.61 and 28,907.50

Step by Step Solution

1. Step 1: Write the proportion equation
   52,782.37 : 72,840.61 = 28,907.50 : x
2. Step 2: Convert to fraction form
   52,782.37/72,840.61 = 28,907.50/x
3. Step 3: Cross multiply
   52,782.37x = 72,840.61 × 28,907.50
4. Step 4: Simplify right side
   52,782.37x = 2,105,639,933.58
5. Step 5: Solve for x
   x = 2,105,639,933.58/52,782.37
6. Step 6: Final answer
   x = 39,892.86