Finding the Fourth Proportional to 52,636.91, 72,638.51 and 28,763.15

Step by Step Solution

1. Step 1: Write the proportion equation
   52,636.91 : 72,638.51 = 28,763.15 : x
2. Step 2: Convert to fraction form
   52,636.91/72,638.51 = 28,763.15/x
3. Step 3: Cross multiply
   52,636.91x = 72,638.51 × 28,763.15
4. Step 4: Simplify right side
   52,636.91x = 2,089,311,851.90
5. Step 5: Solve for x
   x = 2,089,311,851.90/52,636.91
6. Step 6: Final answer
   x = 39,692.91