Finding the Fourth Proportional to 65,954.56, 91,012.99 and 42,078.67

Step by Step Solution

1. Step 1: Write the proportion equation
   65,954.56 : 91,012.99 = 42,078.67 : x
2. Step 2: Convert to fraction form
   65,954.56/91,012.99 = 42,078.67/x
3. Step 3: Cross multiply
   65,954.56x = 91,012.99 × 42,078.67
4. Step 4: Simplify right side
   65,954.56x = 3,829,705,571.92
5. Step 5: Solve for x
   x = 3,829,705,571.92/65,954.56
6. Step 6: Final answer
   x = 58,065.82