Finding the Fourth Proportional to 76,394.80, 105,422.04 and 42,404.80

Step by Step Solution

1. Step 1: Write the proportion equation
   76,394.80 : 105,422.04 = 42,404.80 : x
2. Step 2: Convert to fraction form
   76,394.80/105,422.04 = 42,404.80/x
3. Step 3: Cross multiply
   76,394.80x = 105,422.04 × 42,404.80
4. Step 4: Simplify right side
   76,394.80x = 4,470,400,521.79
5. Step 5: Solve for x
   x = 4,470,400,521.79/76,394.80
6. Step 6: Final answer
   x = 58,517.08