Finding the Fourth Proportional to 65,173.73, 89,953.79 and 39,688.52

Step by Step Solution

1. Step 1: Write the proportion equation
   65,173.73 : 89,953.79 = 39,688.52 : x
2. Step 2: Convert to fraction form
   65,173.73/89,953.79 = 39,688.52/x
3. Step 3: Cross multiply
   65,173.73x = 89,953.79 × 39,688.52
4. Step 4: Simplify right side
   65,173.73x = 3,570,132,145.28
5. Step 5: Solve for x
   x = 3,570,132,145.28/65,173.73
6. Step 6: Final answer
   x = 54,778.70