Finding the Fourth Proportional to 139,447.56, 209,082.62 and 64,467.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,447.56 : 209,082.62 = 64,467.48 : x
2. Step 2: Convert to fraction form
   139,447.56/209,082.62 = 64,467.48/x
3. Step 3: Cross multiply
   139,447.56x = 209,082.62 × 64,467.48
4. Step 4: Simplify right side
   139,447.56x = 13,479,029,623.20
5. Step 5: Solve for x
   x = 13,479,029,623.20/139,447.56
6. Step 6: Final answer
   x = 96,660.20