Finding the Fourth Proportional to 76,550.81, 105,643.72 and 42,559.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,550.81 : 105,643.72 = 42,559.86 : x
2. Step 2: Convert to fraction form
   76,550.81/105,643.72 = 42,559.86/x
3. Step 3: Cross multiply
   76,550.81x = 105,643.72 × 42,559.86
4. Step 4: Simplify right side
   76,550.81x = 4,496,181,933.08
5. Step 5: Solve for x
   x = 4,496,181,933.08/76,550.81
6. Step 6: Final answer
   x = 58,734.61