Finding the Fourth Proportional to 139,144.12, 208,672.38 and 45,628.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,144.12 : 208,672.38 = 45,628.04 : x
2. Step 2: Convert to fraction form
   139,144.12/208,672.38 = 45,628.04/x
3. Step 3: Cross multiply
   139,144.12x = 208,672.38 × 45,628.04
4. Step 4: Simplify right side
   139,144.12x = 9,521,311,701.54
5. Step 5: Solve for x
   x = 9,521,311,701.54/139,144.12
6. Step 6: Final answer
   x = 68,427.70