Finding the Fourth Proportional to 52,636.28, 72,639.86 and 28,764.50

Step by Step Solution

1. Step 1: Write the proportion equation
   52,636.28 : 72,639.86 = 28,764.50 : x
2. Step 2: Convert to fraction form
   52,636.28/72,639.86 = 28,764.50/x
3. Step 3: Cross multiply
   52,636.28x = 72,639.86 × 28,764.50
4. Step 4: Simplify right side
   52,636.28x = 2,089,448,745.95
5. Step 5: Solve for x
   x = 2,089,448,745.95/52,636.28
6. Step 6: Final answer
   x = 39,695.98