Finding the Fourth Proportional to 76,345.75, 105,357.27 and 42,353.20

Step by Step Solution

1. Step 1: Write the proportion equation
   76,345.75 : 105,357.27 = 42,353.20 : x
2. Step 2: Convert to fraction form
   76,345.75/105,357.27 = 42,353.20/x
3. Step 3: Cross multiply
   76,345.75x = 105,357.27 × 42,353.20
4. Step 4: Simplify right side
   76,345.75x = 4,462,217,527.76
5. Step 5: Solve for x
   x = 4,462,217,527.76/76,345.75
6. Step 6: Final answer
   x = 58,447.49