Finding the Fourth Proportional to 76,609.20, 105,633.52 and 53,940.94

Step by Step Solution

1. Step 1: Write the proportion equation
   76,609.20 : 105,633.52 = 53,940.94 : x
2. Step 2: Convert to fraction form
   76,609.20/105,633.52 = 53,940.94/x
3. Step 3: Cross multiply
   76,609.20x = 105,633.52 × 53,940.94
4. Step 4: Simplify right side
   76,609.20x = 5,697,971,364.31
5. Step 5: Solve for x
   x = 5,697,971,364.31/76,609.20
6. Step 6: Final answer
   x = 74,377.12