Finding the Fourth Proportional to 52,636.83, 72,638.67 and 28,763.65

Step by Step Solution

1. Step 1: Write the proportion equation
   52,636.83 : 72,638.67 = 28,763.65 : x
2. Step 2: Convert to fraction form
   52,636.83/72,638.67 = 28,763.65/x
3. Step 3: Cross multiply
   52,636.83x = 72,638.67 × 28,763.65
4. Step 4: Simplify right side
   52,636.83x = 2,089,353,280.35
5. Step 5: Solve for x
   x = 2,089,353,280.35/52,636.83
6. Step 6: Final answer
   x = 39,693.75