Finding the Fourth Proportional to 139,667.20, 209,556.90 and 63,801.70

Step by Step Solution

1. Step 1: Write the proportion equation
   139,667.20 : 209,556.90 = 63,801.70 : x
2. Step 2: Convert to fraction form
   139,667.20/209,556.90 = 63,801.70/x
3. Step 3: Cross multiply
   139,667.20x = 209,556.90 × 63,801.70
4. Step 4: Simplify right side
   139,667.20x = 13,370,086,466.73
5. Step 5: Solve for x
   x = 13,370,086,466.73/139,667.20
6. Step 6: Final answer
   x = 95,728.18