Finding the Fourth Proportional to 78,410.24, 108,205.55 and 42,600.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,410.24 : 108,205.55 = 42,600.55 : x
2. Step 2: Convert to fraction form
   78,410.24/108,205.55 = 42,600.55/x
3. Step 3: Cross multiply
   78,410.24x = 108,205.55 × 42,600.55
4. Step 4: Simplify right side
   78,410.24x = 4,609,615,189.02
5. Step 5: Solve for x
   x = 4,609,615,189.02/78,410.24
6. Step 6: Final answer
   x = 58,788.43