Finding the Fourth Proportional to 139,112.02, 208,527.82 and 54,839.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,112.02 : 208,527.82 = 54,839.57 : x
2. Step 2: Convert to fraction form
   139,112.02/208,527.82 = 54,839.57/x
3. Step 3: Cross multiply
   139,112.02x = 208,527.82 × 54,839.57
4. Step 4: Simplify right side
   139,112.02x = 11,435,574,802.10
5. Step 5: Solve for x
   x = 11,435,574,802.10/139,112.02
6. Step 6: Final answer
   x = 82,204.08