Finding the Fourth Proportional to 139,172.16, 208,587.24 and 64,188.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,172.16 : 208,587.24 = 64,188.24 : x
2. Step 2: Convert to fraction form
   139,172.16/208,587.24 = 64,188.24/x
3. Step 3: Cross multiply
   139,172.16x = 208,587.24 × 64,188.24
4. Step 4: Simplify right side
   139,172.16x = 13,388,847,822.06
5. Step 5: Solve for x
   x = 13,388,847,822.06/139,172.16
6. Step 6: Final answer
   x = 96,203.49