Finding the Fourth Proportional to 49,128.06, 67,793.76 and 28,991.25

Step by Step Solution

1. Step 1: Write the proportion equation
   49,128.06 : 67,793.76 = 28,991.25 : x
2. Step 2: Convert to fraction form
   49,128.06/67,793.76 = 28,991.25/x
3. Step 3: Cross multiply
   49,128.06x = 67,793.76 × 28,991.25
4. Step 4: Simplify right side
   49,128.06x = 1,965,425,844.60
5. Step 5: Solve for x
   x = 1,965,425,844.60/49,128.06
6. Step 6: Final answer
   x = 40,006.18