Finding the Fourth Proportional to 52,638.42, 72,641.97 and 28,766.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,638.42 : 72,641.97 = 28,766.10 : x
2. Step 2: Convert to fraction form
   52,638.42/72,641.97 = 28,766.10/x
3. Step 3: Cross multiply
   52,638.42x = 72,641.97 × 28,766.10
4. Step 4: Simplify right side
   52,638.42x = 2,089,626,173.22
5. Step 5: Solve for x
   x = 2,089,626,173.22/52,638.42
6. Step 6: Final answer
   x = 39,697.74