Finding the Fourth Proportional to 76,487.56, 105,551.46 and 42,496.20

Step by Step Solution

1. Step 1: Write the proportion equation
   76,487.56 : 105,551.46 = 42,496.20 : x
2. Step 2: Convert to fraction form
   76,487.56/105,551.46 = 42,496.20/x
3. Step 3: Cross multiply
   76,487.56x = 105,551.46 × 42,496.20
4. Step 4: Simplify right side
   76,487.56x = 4,485,535,954.45
5. Step 5: Solve for x
   x = 4,485,535,954.45/76,487.56
6. Step 6: Final answer
   x = 58,643.99