Finding the Fourth Proportional to 52,672.86, 72,688.05 and 28,799.28

Step by Step Solution

1. Step 1: Write the proportion equation
   52,672.86 : 72,688.05 = 28,799.28 : x
2. Step 2: Convert to fraction form
   52,672.86/72,688.05 = 28,799.28/x
3. Step 3: Cross multiply
   52,672.86x = 72,688.05 × 28,799.28
4. Step 4: Simplify right side
   52,672.86x = 2,093,363,504.60
5. Step 5: Solve for x
   x = 2,093,363,504.60/52,672.86
6. Step 6: Final answer
   x = 39,742.73