Finding the Fourth Proportional to 139,156.84, 208,610.52 and 64,239.13

Step by Step Solution

1. Step 1: Write the proportion equation
   139,156.84 : 208,610.52 = 64,239.13 : x
2. Step 2: Convert to fraction form
   139,156.84/208,610.52 = 64,239.13/x
3. Step 3: Cross multiply
   139,156.84x = 208,610.52 × 64,239.13
4. Step 4: Simplify right side
   139,156.84x = 13,400,958,313.65
5. Step 5: Solve for x
   x = 13,400,958,313.65/139,156.84
6. Step 6: Final answer
   x = 96,301.11