Finding the Fourth Proportional to 78,912.70, 108,871.23 and 46,640.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,912.70 : 108,871.23 = 46,640.55 : x
2. Step 2: Convert to fraction form
   78,912.70/108,871.23 = 46,640.55/x
3. Step 3: Cross multiply
   78,912.70x = 108,871.23 × 46,640.55
4. Step 4: Simplify right side
   78,912.70x = 5,077,814,046.38
5. Step 5: Solve for x
   x = 5,077,814,046.38/78,912.70
6. Step 6: Final answer
   x = 64,347.23