Finding the Fourth Proportional to 61,355.97, 91,978.59 and 42,644.82

Step by Step Solution

1. Step 1: Write the proportion equation
   61,355.97 : 91,978.59 = 42,644.82 : x
2. Step 2: Convert to fraction form
   61,355.97/91,978.59 = 42,644.82/x
3. Step 3: Cross multiply
   61,355.97x = 91,978.59 × 42,644.82
4. Step 4: Simplify right side
   61,355.97x = 3,922,410,574.32
5. Step 5: Solve for x
   x = 3,922,410,574.32/61,355.97
6. Step 6: Final answer
   x = 63,928.75