Finding the Fourth Proportional to 78,408.49, 108,203.13 and 42,598.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78,408.49 : 108,203.13 = 42,598.79 : x
2. Step 2: Convert to fraction form
   78,408.49/108,203.13 = 42,598.79/x
3. Step 3: Cross multiply
   78,408.49x = 108,203.13 × 42,598.79
4. Step 4: Simplify right side
   78,408.49x = 4,609,322,682.72
5. Step 5: Solve for x
   x = 4,609,322,682.72/78,408.49
6. Step 6: Final answer
   x = 58,786.02