Finding the Fourth Proportional to 78,382.91, 117,493.83 and 30,978.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,382.91 : 117,493.83 = 30,978.74 : x
2. Step 2: Convert to fraction form
   78,382.91/117,493.83 = 30,978.74/x
3. Step 3: Cross multiply
   78,382.91x = 117,493.83 × 30,978.74
4. Step 4: Simplify right side
   78,382.91x = 3,639,810,223.71
5. Step 5: Solve for x
   x = 3,639,810,223.71/78,382.91
6. Step 6: Final answer
   x = 46,436.28