Finding the Fourth Proportional to 52,638.70, 72,638.31 and 28,760.62

Step by Step Solution

1. Step 1: Write the proportion equation
   52,638.70 : 72,638.31 = 28,760.62 : x
2. Step 2: Convert to fraction form
   52,638.70/72,638.31 = 28,760.62/x
3. Step 3: Cross multiply
   52,638.70x = 72,638.31 × 28,760.62
4. Step 4: Simplify right side
   52,638.70x = 2,089,122,831.35
5. Step 5: Solve for x
   x = 2,089,122,831.35/52,638.70
6. Step 6: Final answer
   x = 39,687.96