Finding the Fourth Proportional to 76,406.82, 105,438.69 and 42,416.79

Step by Step Solution

1. Step 1: Write the proportion equation
   76,406.82 : 105,438.69 = 42,416.79 : x
2. Step 2: Convert to fraction form
   76,406.82/105,438.69 = 42,416.79/x
3. Step 3: Cross multiply
   76,406.82x = 105,438.69 × 42,416.79
4. Step 4: Simplify right side
   76,406.82x = 4,472,370,771.61
5. Step 5: Solve for x
   x = 4,472,370,771.61/76,406.82
6. Step 6: Final answer
   x = 58,533.66