Finding the Fourth Proportional to 78,619.18, 108,491.94 and 42,808.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,619.18 : 108,491.94 = 42,808.90 : x
2. Step 2: Convert to fraction form
   78,619.18/108,491.94 = 42,808.90/x
3. Step 3: Cross multiply
   78,619.18x = 108,491.94 × 42,808.90
4. Step 4: Simplify right side
   78,619.18x = 4,644,420,610.27
5. Step 5: Solve for x
   x = 4,644,420,610.27/78,619.18
6. Step 6: Final answer
   x = 59,074.91