Finding the Fourth Proportional to 76,799.12, 105,960.71 and 49,981.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,799.12 : 105,960.71 = 49,981.10 : x
2. Step 2: Convert to fraction form
   76,799.12/105,960.71 = 49,981.10/x
3. Step 3: Cross multiply
   76,799.12x = 105,960.71 × 49,981.10
4. Step 4: Simplify right side
   76,799.12x = 5,296,032,592.68
5. Step 5: Solve for x
   x = 5,296,032,592.68/76,799.12
6. Step 6: Final answer
   x = 68,959.55