Finding the Fourth Proportional to 138,711.89, 208,018.60 and 49,941.56

Step by Step Solution

1. Step 1: Write the proportion equation
   138,711.89 : 208,018.60 = 49,941.56 : x
2. Step 2: Convert to fraction form
   138,711.89/208,018.60 = 49,941.56/x
3. Step 3: Cross multiply
   138,711.89x = 208,018.60 × 49,941.56
4. Step 4: Simplify right side
   138,711.89x = 10,388,773,788.21
5. Step 5: Solve for x
   x = 10,388,773,788.21/138,711.89
6. Step 6: Final answer
   x = 74,894.62