Finding the Fourth Proportional to 139,544.72, 209,168 and 64,577.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,544.72 : 209,168 = 64,577.60 : x
2. Step 2: Convert to fraction form
   139,544.72/209,168 = 64,577.60/x
3. Step 3: Cross multiply
   139,544.72x = 209,168 × 64,577.60
4. Step 4: Simplify right side
   139,544.72x = 13,507,567,436.80
5. Step 5: Solve for x
   x = 13,507,567,436.80/139,544.72
6. Step 6: Final answer
   x = 96,797.41