Finding the Fourth Proportional to 52,621.09, 72,618.69 and 28,749.31

Step by Step Solution

1. Step 1: Write the proportion equation
   52,621.09 : 72,618.69 = 28,749.31 : x
2. Step 2: Convert to fraction form
   52,621.09/72,618.69 = 28,749.31/x
3. Step 3: Cross multiply
   52,621.09x = 72,618.69 × 28,749.31
4. Step 4: Simplify right side
   52,621.09x = 2,087,737,230.60
5. Step 5: Solve for x
   x = 2,087,737,230.60/52,621.09
6. Step 6: Final answer
   x = 39,674.91