Finding the Fourth Proportional to 76,463, 105,520.16 and 42,928.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,463 : 105,520.16 = 42,928.28 : x
2. Step 2: Convert to fraction form
   76,463/105,520.16 = 42,928.28/x
3. Step 3: Cross multiply
   76,463x = 105,520.16 × 42,928.28
4. Step 4: Simplify right side
   76,463x = 4,529,798,974.12
5. Step 5: Solve for x
   x = 4,529,798,974.12/76,463
6. Step 6: Final answer
   x = 59,241.71