Finding the Fourth Proportional to 78,728.69, 108,612.88 and 46,450.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,728.69 : 108,612.88 = 46,450.50 : x
2. Step 2: Convert to fraction form
   78,728.69/108,612.88 = 46,450.50/x
3. Step 3: Cross multiply
   78,728.69x = 108,612.88 × 46,450.50
4. Step 4: Simplify right side
   78,728.69x = 5,045,122,320.30
5. Step 5: Solve for x
   x = 5,045,122,320.30/78,728.69
6. Step 6: Final answer
   x = 64,082.38