Finding the Fourth Proportional to 78,778.84, 108,715.98 and 42,968.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,778.84 : 108,715.98 = 42,968.72 : x
2. Step 2: Convert to fraction form
   78,778.84/108,715.98 = 42,968.72/x
3. Step 3: Cross multiply
   78,778.84x = 108,715.98 × 42,968.72
4. Step 4: Simplify right side
   78,778.84x = 4,671,386,504.15
5. Step 5: Solve for x
   x = 4,671,386,504.15/78,778.84
6. Step 6: Final answer
   x = 59,297.48