Finding the Fourth Proportional to 55,561.83, 76,686.26 and 42,109.62

Step by Step Solution

1. Step 1: Write the proportion equation
   55,561.83 : 76,686.26 = 42,109.62 : x
2. Step 2: Convert to fraction form
   55,561.83/76,686.26 = 42,109.62/x
3. Step 3: Cross multiply
   55,561.83x = 76,686.26 × 42,109.62
4. Step 4: Simplify right side
   55,561.83x = 3,229,229,057.27
5. Step 5: Solve for x
   x = 3,229,229,057.27/55,561.83
6. Step 6: Final answer
   x = 58,119.56