Finding the Fourth Proportional to 139,002.11, 208,424.18 and 54,716.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,002.11 : 208,424.18 = 54,716.63 : x
2. Step 2: Convert to fraction form
   139,002.11/208,424.18 = 54,716.63/x
3. Step 3: Cross multiply
   139,002.11x = 208,424.18 × 54,716.63
4. Step 4: Simplify right side
   139,002.11x = 11,404,267,424.41
5. Step 5: Solve for x
   x = 11,404,267,424.41/139,002.11
6. Step 6: Final answer
   x = 82,043.84