Finding the Fourth Proportional to 76,216.50, 105,178.57 and 42,225.05

Step by Step Solution

1. Step 1: Write the proportion equation
   76,216.50 : 105,178.57 = 42,225.05 : x
2. Step 2: Convert to fraction form
   76,216.50/105,178.57 = 42,225.05/x
3. Step 3: Cross multiply
   76,216.50x = 105,178.57 × 42,225.05
4. Step 4: Simplify right side
   76,216.50x = 4,441,170,534.56
5. Step 5: Solve for x
   x = 4,441,170,534.56/76,216.50
6. Step 6: Final answer
   x = 58,270.46