Finding the Fourth Proportional to 52,636.42, 72,639.21 and 28,764.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,636.42 : 72,639.21 = 28,764.10 : x
2. Step 2: Convert to fraction form
   52,636.42/72,639.21 = 28,764.10/x
3. Step 3: Cross multiply
   52,636.42x = 72,639.21 × 28,764.10
4. Step 4: Simplify right side
   52,636.42x = 2,089,401,500.36
5. Step 5: Solve for x
   x = 2,089,401,500.36/52,636.42
6. Step 6: Final answer
   x = 39,694.98