Finding the Fourth Proportional to 139,453.94, 209,064.32 and 64,627.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,453.94 : 209,064.32 = 64,627.72 : x
2. Step 2: Convert to fraction form
   139,453.94/209,064.32 = 64,627.72/x
3. Step 3: Cross multiply
   139,453.94x = 209,064.32 × 64,627.72
4. Step 4: Simplify right side
   139,453.94x = 13,511,350,334.95
5. Step 5: Solve for x
   x = 13,511,350,334.95/139,453.94
6. Step 6: Final answer
   x = 96,887.55