Finding the Fourth Proportional to 139,647.94, 209,307.83 and 64,609.54

Step by Step Solution

1. Step 1: Write the proportion equation
   139,647.94 : 209,307.83 = 64,609.54 : x
2. Step 2: Convert to fraction form
   139,647.94/209,307.83 = 64,609.54/x
3. Step 3: Cross multiply
   139,647.94x = 209,307.83 × 64,609.54
4. Step 4: Simplify right side
   139,647.94x = 13,523,282,614.70
5. Step 5: Solve for x
   x = 13,523,282,614.70/139,647.94
6. Step 6: Final answer
   x = 96,838.40