Finding the Fourth Proportional to 49,917.80, 68,898.12 and 28,709.30

Step by Step Solution

1. Step 1: Write the proportion equation
   49,917.80 : 68,898.12 = 28,709.30 : x
2. Step 2: Convert to fraction form
   49,917.80/68,898.12 = 28,709.30/x
3. Step 3: Cross multiply
   49,917.80x = 68,898.12 × 28,709.30
4. Step 4: Simplify right side
   49,917.80x = 1,978,016,796.52
5. Step 5: Solve for x
   x = 1,978,016,796.52/49,917.80
6. Step 6: Final answer
   x = 39,625.48