Finding the Fourth Proportional to 65,789.28, 90,789.71 and 36,321.93

Step by Step Solution

1. Step 1: Write the proportion equation
   65,789.28 : 90,789.71 = 36,321.93 : x
2. Step 2: Convert to fraction form
   65,789.28/90,789.71 = 36,321.93/x
3. Step 3: Cross multiply
   65,789.28x = 90,789.71 × 36,321.93
4. Step 4: Simplify right side
   65,789.28x = 3,297,657,491.34
5. Step 5: Solve for x
   x = 3,297,657,491.34/65,789.28
6. Step 6: Final answer
   x = 50,124.54