Finding the Fourth Proportional to 78,464.69, 108,279.99 and 42,655.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,464.69 : 108,279.99 = 42,655.59 : x
2. Step 2: Convert to fraction form
   78,464.69/108,279.99 = 42,655.59/x
3. Step 3: Cross multiply
   78,464.69x = 108,279.99 × 42,655.59
4. Step 4: Simplify right side
   78,464.69x = 4,618,746,858.64
5. Step 5: Solve for x
   x = 4,618,746,858.64/78,464.69
6. Step 6: Final answer
   x = 58,864.02