Finding the Fourth Proportional to 65,953.97, 91,012.15 and 42,078.10

Step by Step Solution

1. Step 1: Write the proportion equation
   65,953.97 : 91,012.15 = 42,078.10 : x
2. Step 2: Convert to fraction form
   65,953.97/91,012.15 = 42,078.10/x
3. Step 3: Cross multiply
   65,953.97x = 91,012.15 × 42,078.10
4. Step 4: Simplify right side
   65,953.97x = 3,829,618,348.92
5. Step 5: Solve for x
   x = 3,829,618,348.92/65,953.97
6. Step 6: Final answer
   x = 58,065.02