Finding the Fourth Proportional to 78,789, 118,117.21 and 36,647.67

Step by Step Solution

1. Step 1: Write the proportion equation
   78,789 : 118,117.21 = 36,647.67 : x
2. Step 2: Convert to fraction form
   78,789/118,117.21 = 36,647.67/x
3. Step 3: Cross multiply
   78,789x = 118,117.21 × 36,647.67
4. Step 4: Simplify right side
   78,789x = 4,328,720,533.40
5. Step 5: Solve for x
   x = 4,328,720,533.40/78,789
6. Step 6: Final answer
   x = 54,940.67