Finding the Fourth Proportional to 76,484.94, 105,519.72 and 56,389.59

Step by Step Solution

1. Step 1: Write the proportion equation
   76,484.94 : 105,519.72 = 56,389.59 : x
2. Step 2: Convert to fraction form
   76,484.94/105,519.72 = 56,389.59/x
3. Step 3: Cross multiply
   76,484.94x = 105,519.72 × 56,389.59
4. Step 4: Simplify right side
   76,484.94x = 5,950,213,747.71
5. Step 5: Solve for x
   x = 5,950,213,747.71/76,484.94
6. Step 6: Final answer
   x = 77,795.89