Finding the Fourth Proportional to 81,932.79, 122,899.58 and 28,624.54

Step by Step Solution

1. Step 1: Write the proportion equation
   81,932.79 : 122,899.58 = 28,624.54 : x
2. Step 2: Convert to fraction form
   81,932.79/122,899.58 = 28,624.54/x
3. Step 3: Cross multiply
   81,932.79x = 122,899.58 × 28,624.54
4. Step 4: Simplify right side
   81,932.79x = 3,517,943,934.96
5. Step 5: Solve for x
   x = 3,517,943,934.96/81,932.79
6. Step 6: Final answer
   x = 42,936.95