Finding the Fourth Proportional to 65,809.98, 90,817.79 and 37,135.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,809.98 : 90,817.79 = 37,135.72 : x
2. Step 2: Convert to fraction form
   65,809.98/90,817.79 = 37,135.72/x
3. Step 3: Cross multiply
   65,809.98x = 90,817.79 × 37,135.72
4. Step 4: Simplify right side
   65,809.98x = 3,372,584,020.46
5. Step 5: Solve for x
   x = 3,372,584,020.46/65,809.98
6. Step 6: Final answer
   x = 51,247.30