Finding the Fourth Proportional to 83,139.84, 114,691.86 and 49,131.87

Step by Step Solution

1. Step 1: Write the proportion equation
   83,139.84 : 114,691.86 = 49,131.87 : x
2. Step 2: Convert to fraction form
   83,139.84/114,691.86 = 49,131.87/x
3. Step 3: Cross multiply
   83,139.84x = 114,691.86 × 49,131.87
4. Step 4: Simplify right side
   83,139.84x = 5,635,025,555.58
5. Step 5: Solve for x
   x = 5,635,025,555.58/83,139.84
6. Step 6: Final answer
   x = 67,777.68