Finding the Fourth Proportional to 139,097.84, 208,646.76 and 65,208.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,097.84 : 208,646.76 = 65,208.56 : x
2. Step 2: Convert to fraction form
   139,097.84/208,646.76 = 65,208.56/x
3. Step 3: Cross multiply
   139,097.84x = 208,646.76 × 65,208.56
4. Step 4: Simplify right side
   139,097.84x = 13,605,554,768.27
5. Step 5: Solve for x
   x = 13,605,554,768.27/139,097.84
6. Step 6: Final answer
   x = 97,812.84