Finding the Fourth Proportional to 65,805.72, 90,812.58 and 60,782.94

Step by Step Solution

1. Step 1: Write the proportion equation
   65,805.72 : 90,812.58 = 60,782.94 : x
2. Step 2: Convert to fraction form
   65,805.72/90,812.58 = 60,782.94/x
3. Step 3: Cross multiply
   65,805.72x = 90,812.58 × 60,782.94
4. Step 4: Simplify right side
   65,805.72x = 5,519,855,601.39
5. Step 5: Solve for x
   x = 5,519,855,601.39/65,805.72
6. Step 6: Final answer
   x = 83,881.09