Finding the Fourth Proportional to 139,865.32, 209,849.82 and 65,025.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,865.32 : 209,849.82 = 65,025.64 : x
2. Step 2: Convert to fraction form
   139,865.32/209,849.82 = 65,025.64/x
3. Step 3: Cross multiply
   139,865.32x = 209,849.82 × 65,025.64
4. Step 4: Simplify right side
   139,865.32x = 13,645,618,849.38
5. Step 5: Solve for x
   x = 13,645,618,849.38/139,865.32
6. Step 6: Final answer
   x = 97,562.56