Finding the Fourth Proportional to 52,621.78, 72,617.79 and 28,749.82

Step by Step Solution

1. Step 1: Write the proportion equation
   52,621.78 : 72,617.79 = 28,749.82 : x
2. Step 2: Convert to fraction form
   52,621.78/72,617.79 = 28,749.82/x
3. Step 3: Cross multiply
   52,621.78x = 72,617.79 × 28,749.82
4. Step 4: Simplify right side
   52,621.78x = 2,087,748,391.30
5. Step 5: Solve for x
   x = 2,087,748,391.30/52,621.78
6. Step 6: Final answer
   x = 39,674.61