Finding the Fourth Proportional to 52,643.92, 72,649.56 and 28,771.60

Step by Step Solution

1. Step 1: Write the proportion equation
   52,643.92 : 72,649.56 = 28,771.60 : x
2. Step 2: Convert to fraction form
   52,643.92/72,649.56 = 28,771.60/x
3. Step 3: Cross multiply
   52,643.92x = 72,649.56 × 28,771.60
4. Step 4: Simplify right side
   52,643.92x = 2,090,244,080.50
5. Step 5: Solve for x
   x = 2,090,244,080.50/52,643.92
6. Step 6: Final answer
   x = 39,705.33