Finding the Fourth Proportional to 78,472.94, 108,294.78 and 42,665.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,472.94 : 108,294.78 = 42,665.42 : x
2. Step 2: Convert to fraction form
   78,472.94/108,294.78 = 42,665.42/x
3. Step 3: Cross multiply
   78,472.94x = 108,294.78 × 42,665.42
4. Step 4: Simplify right side
   78,472.94x = 4,620,442,272.51
5. Step 5: Solve for x
   x = 4,620,442,272.51/78,472.94
6. Step 6: Final answer
   x = 58,879.43