Finding the Fourth Proportional to 51,205.10, 70,662.78 and 28,543.86

Step by Step Solution

1. Step 1: Write the proportion equation
   51,205.10 : 70,662.78 = 28,543.86 : x
2. Step 2: Convert to fraction form
   51,205.10/70,662.78 = 28,543.86/x
3. Step 3: Cross multiply
   51,205.10x = 70,662.78 × 28,543.86
4. Step 4: Simplify right side
   51,205.10x = 2,016,988,499.53
5. Step 5: Solve for x
   x = 2,016,988,499.53/51,205.10
6. Step 6: Final answer
   x = 39,390.39