Finding the Fourth Proportional to 76,398.98, 105,425.32 and 42,404.80

Step by Step Solution

1. Step 1: Write the proportion equation
   76,398.98 : 105,425.32 = 42,404.80 : x
2. Step 2: Convert to fraction form
   76,398.98/105,425.32 = 42,404.80/x
3. Step 3: Cross multiply
   76,398.98x = 105,425.32 × 42,404.80
4. Step 4: Simplify right side
   76,398.98x = 4,470,539,042.29
5. Step 5: Solve for x
   x = 4,470,539,042.29/76,398.98
6. Step 6: Final answer
   x = 58,515.69