Finding the Fourth Proportional to 76,713.12, 105,861.24 and 42,723

Step by Step Solution

1. Step 1: Write the proportion equation
   76,713.12 : 105,861.24 = 42,723 : x
2. Step 2: Convert to fraction form
   76,713.12/105,861.24 = 42,723/x
3. Step 3: Cross multiply
   76,713.12x = 105,861.24 × 42,723
4. Step 4: Simplify right side
   76,713.12x = 4,522,709,756.52
5. Step 5: Solve for x
   x = 4,522,709,756.52/76,713.12
6. Step 6: Final answer
   x = 58,956.14