Finding the Fourth Proportional to 76,490.43, 105,556.03 and 42,498.18

Step by Step Solution

1. Step 1: Write the proportion equation
   76,490.43 : 105,556.03 = 42,498.18 : x
2. Step 2: Convert to fraction form
   76,490.43/105,556.03 = 42,498.18/x
3. Step 3: Cross multiply
   76,490.43x = 105,556.03 × 42,498.18
4. Step 4: Simplify right side
   76,490.43x = 4,485,939,163.03
5. Step 5: Solve for x
   x = 4,485,939,163.03/76,490.43
6. Step 6: Final answer
   x = 58,647.06