Finding the Fourth Proportional to 78,429.82, 108,230.97 and 42,618.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,429.82 : 108,230.97 = 42,618.64 : x
2. Step 2: Convert to fraction form
   78,429.82/108,230.97 = 42,618.64/x
3. Step 3: Cross multiply
   78,429.82x = 108,230.97 × 42,618.64
4. Step 4: Simplify right side
   78,429.82x = 4,612,656,747.28
5. Step 5: Solve for x
   x = 4,612,656,747.28/78,429.82
6. Step 6: Final answer
   x = 58,812.54