Finding the Fourth Proportional to 52,812, 72,880.56 and 28,939.58

Step by Step Solution

1. Step 1: Write the proportion equation
   52,812 : 72,880.56 = 28,939.58 : x
2. Step 2: Convert to fraction form
   52,812/72,880.56 = 28,939.58/x
3. Step 3: Cross multiply
   52,812x = 72,880.56 × 28,939.58
4. Step 4: Simplify right side
   52,812x = 2,109,132,705.46
5. Step 5: Solve for x
   x = 2,109,132,705.46/52,812
6. Step 6: Final answer
   x = 39,936.62