Finding the Fourth Proportional to 139,892.32, 209,890.36 and 65,052.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,892.32 : 209,890.36 = 65,052.64 : x
2. Step 2: Convert to fraction form
   139,892.32/209,890.36 = 65,052.64/x
3. Step 3: Cross multiply
   139,892.32x = 209,890.36 × 65,052.64
4. Step 4: Simplify right side
   139,892.32x = 13,653,922,028.55
5. Step 5: Solve for x
   x = 13,653,922,028.55/139,892.32
6. Step 6: Final answer
   x = 97,603.09