Finding the Fourth Proportional to 139,868.32, 209,854.32 and 65,028.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,868.32 : 209,854.32 = 65,028.64 : x
2. Step 2: Convert to fraction form
   139,868.32/209,854.32 = 65,028.64/x
3. Step 3: Cross multiply
   139,868.32x = 209,854.32 × 65,028.64
4. Step 4: Simplify right side
   139,868.32x = 13,646,541,027.72
5. Step 5: Solve for x
   x = 13,646,541,027.72/139,868.32
6. Step 6: Final answer
   x = 97,567.06