Finding the Fourth Proportional to 76,806.72, 105,999.44 and 42,826.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,806.72 : 105,999.44 = 42,826.28 : x
2. Step 2: Convert to fraction form
   76,806.72/105,999.44 = 42,826.28/x
3. Step 3: Cross multiply
   76,806.72x = 105,999.44 × 42,826.28
4. Step 4: Simplify right side
   76,806.72x = 4,539,560,953.15
5. Step 5: Solve for x
   x = 4,539,560,953.15/76,806.72
6. Step 6: Final answer
   x = 59,103.70