Finding the Fourth Proportional to 139,078.49, 208,563.13 and 49,102

Step by Step Solution

1. Step 1: Write the proportion equation
   139,078.49 : 208,563.13 = 49,102 : x
2. Step 2: Convert to fraction form
   139,078.49/208,563.13 = 49,102/x
3. Step 3: Cross multiply
   139,078.49x = 208,563.13 × 49,102
4. Step 4: Simplify right side
   139,078.49x = 10,240,866,809.26
5. Step 5: Solve for x
   x = 10,240,866,809.26/139,078.49
6. Step 6: Final answer
   x = 73,633.72