Finding the Fourth Proportional to 76,477.43, 105,509.38 and 56,382.09

Step by Step Solution

1. Step 1: Write the proportion equation
   76,477.43 : 105,509.38 = 56,382.09 : x
2. Step 2: Convert to fraction form
   76,477.43/105,509.38 = 56,382.09/x
3. Step 3: Cross multiply
   76,477.43x = 105,509.38 × 56,382.09
4. Step 4: Simplify right side
   76,477.43x = 5,948,839,359.00
5. Step 5: Solve for x
   x = 5,948,839,359.00/76,477.43
6. Step 6: Final answer
   x = 77,785.56