Finding the Fourth Proportional to 76,387.29, 105,436.94 and 49,531.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,387.29 : 105,436.94 = 49,531.47 : x
2. Step 2: Convert to fraction form
   76,387.29/105,436.94 = 49,531.47/x
3. Step 3: Cross multiply
   76,387.29x = 105,436.94 × 49,531.47
4. Step 4: Simplify right side
   76,387.29x = 5,222,446,382.84
5. Step 5: Solve for x
   x = 5,222,446,382.84/76,387.29
6. Step 6: Final answer
   x = 68,368.00