Finding the Fourth Proportional to 47,719.40, 65,858.82 and 28,856.48

Step by Step Solution

1. Step 1: Write the proportion equation
   47,719.40 : 65,858.82 = 28,856.48 : x
2. Step 2: Convert to fraction form
   47,719.40/65,858.82 = 28,856.48/x
3. Step 3: Cross multiply
   47,719.40x = 65,858.82 × 28,856.48
4. Step 4: Simplify right side
   47,719.40x = 1,900,453,778.59
5. Step 5: Solve for x
   x = 1,900,453,778.59/47,719.40
6. Step 6: Final answer
   x = 39,825.60