Finding the Fourth Proportional to 47,685.82, 65,785.86 and 28,812

Step by Step Solution

1. Step 1: Write the proportion equation
   47,685.82 : 65,785.86 = 28,812 : x
2. Step 2: Convert to fraction form
   47,685.82/65,785.86 = 28,812/x
3. Step 3: Cross multiply
   47,685.82x = 65,785.86 × 28,812
4. Step 4: Simplify right side
   47,685.82x = 1,895,422,198.32
5. Step 5: Solve for x
   x = 1,895,422,198.32/47,685.82
6. Step 6: Final answer
   x = 39,748.13