Finding the Fourth Proportional to 76,826.50, 115,259.19 and 21,422.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,826.50 : 115,259.19 = 21,422.50 : x
2. Step 2: Convert to fraction form
   76,826.50/115,259.19 = 21,422.50/x
3. Step 3: Cross multiply
   76,826.50x = 115,259.19 × 21,422.50
4. Step 4: Simplify right side
   76,826.50x = 2,469,139,997.78
5. Step 5: Solve for x
   x = 2,469,139,997.78/76,826.50
6. Step 6: Final answer
   x = 32,139.17