Finding the Fourth Proportional to 139,123.88, 208,716.08 and 45,626.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,123.88 : 208,716.08 = 45,626.12 : x
2. Step 2: Convert to fraction form
   139,123.88/208,716.08 = 45,626.12/x
3. Step 3: Cross multiply
   139,123.88x = 208,716.08 × 45,626.12
4. Step 4: Simplify right side
   139,123.88x = 9,522,904,912.01
5. Step 5: Solve for x
   x = 9,522,904,912.01/139,123.88
6. Step 6: Final answer
   x = 68,449.10