Finding the Fourth Proportional to 76,299.48, 105,287.58 and 42,759

Step by Step Solution

1. Step 1: Write the proportion equation
   76,299.48 : 105,287.58 = 42,759 : x
2. Step 2: Convert to fraction form
   76,299.48/105,287.58 = 42,759/x
3. Step 3: Cross multiply
   76,299.48x = 105,287.58 × 42,759
4. Step 4: Simplify right side
   76,299.48x = 4,501,991,633.22
5. Step 5: Solve for x
   x = 4,501,991,633.22/76,299.48
6. Step 6: Final answer
   x = 59,004.22