Finding the Fourth Proportional to 78,558.37, 108,408.78 and 42,748.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,558.37 : 108,408.78 = 42,748.47 : x
2. Step 2: Convert to fraction form
   78,558.37/108,408.78 = 42,748.47/x
3. Step 3: Cross multiply
   78,558.37x = 108,408.78 × 42,748.47
4. Step 4: Simplify right side
   78,558.37x = 4,634,309,479.57
5. Step 5: Solve for x
   x = 4,634,309,479.57/78,558.37
6. Step 6: Final answer
   x = 58,991.93