Finding the Fourth Proportional to 78,145.78, 107,840.75 and 42,336.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,145.78 : 107,840.75 = 42,336.49 : x
2. Step 2: Convert to fraction form
   78,145.78/107,840.75 = 42,336.49/x
3. Step 3: Cross multiply
   78,145.78x = 107,840.75 × 42,336.49
4. Step 4: Simplify right side
   78,145.78x = 4,565,598,622.29
5. Step 5: Solve for x
   x = 4,565,598,622.29/78,145.78
6. Step 6: Final answer
   x = 58,424.12