Finding the Fourth Proportional to 76,827.50, 115,260.69 and 21,423.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,827.50 : 115,260.69 = 21,423.50 : x
2. Step 2: Convert to fraction form
   76,827.50/115,260.69 = 21,423.50/x
3. Step 3: Cross multiply
   76,827.50x = 115,260.69 × 21,423.50
4. Step 4: Simplify right side
   76,827.50x = 2,469,287,392.22
5. Step 5: Solve for x
   x = 2,469,287,392.22/76,827.50
6. Step 6: Final answer
   x = 32,140.67