Finding the Fourth Proportional to 51,096.78, 70,513.50 and 28,740.78

Step by Step Solution

1. Step 1: Write the proportion equation
   51,096.78 : 70,513.50 = 28,740.78 : x
2. Step 2: Convert to fraction form
   51,096.78/70,513.50 = 28,740.78/x
3. Step 3: Cross multiply
   51,096.78x = 70,513.50 × 28,740.78
4. Step 4: Simplify right side
   51,096.78x = 2,026,612,990.53
5. Step 5: Solve for x
   x = 2,026,612,990.53/51,096.78
6. Step 6: Final answer
   x = 39,662.24