Finding the Fourth Proportional to 76,479.94, 105,512.82 and 56,384.59

Step by Step Solution

1. Step 1: Write the proportion equation
   76,479.94 : 105,512.82 = 56,384.59 : x
2. Step 2: Convert to fraction form
   76,479.94/105,512.82 = 56,384.59/x
3. Step 3: Cross multiply
   76,479.94x = 105,512.82 × 56,384.59
4. Step 4: Simplify right side
   76,479.94x = 5,949,297,095.44
5. Step 5: Solve for x
   x = 5,949,297,095.44/76,479.94
6. Step 6: Final answer
   x = 77,788.99