Finding the Fourth Proportional to 139,530.50, 209,295.96 and 64,609.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,530.50 : 209,295.96 = 64,609.82 : x
2. Step 2: Convert to fraction form
   139,530.50/209,295.96 = 64,609.82/x
3. Step 3: Cross multiply
   139,530.50x = 209,295.96 × 64,609.82
4. Step 4: Simplify right side
   139,530.50x = 13,522,574,302.33
5. Step 5: Solve for x
   x = 13,522,574,302.33/139,530.50
6. Step 6: Final answer
   x = 96,914.83