Finding the Fourth Proportional to 78,464.78, 108,280.11 and 42,655.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,464.78 : 108,280.11 = 42,655.69 : x
2. Step 2: Convert to fraction form
   78,464.78/108,280.11 = 42,655.69/x
3. Step 3: Cross multiply
   78,464.78x = 108,280.11 × 42,655.69
4. Step 4: Simplify right side
   78,464.78x = 4,618,762,694.58
5. Step 5: Solve for x
   x = 4,618,762,694.58/78,464.78
6. Step 6: Final answer
   x = 58,864.16