Finding the Fourth Proportional to 78,790, 118,118.72 and 36,648.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,790 : 118,118.72 = 36,648.68 : x
2. Step 2: Convert to fraction form
   78,790/118,118.72 = 36,648.68/x
3. Step 3: Cross multiply
   78,790x = 118,118.72 × 36,648.68
4. Step 4: Simplify right side
   78,790x = 4,328,895,171.29
5. Step 5: Solve for x
   x = 4,328,895,171.29/78,790
6. Step 6: Final answer
   x = 54,942.19