Finding the Fourth Proportional to 76,396.68, 105,426.38 and 42,405.08

Step by Step Solution

1. Step 1: Write the proportion equation
   76,396.68 : 105,426.38 = 42,405.08 : x
2. Step 2: Convert to fraction form
   76,396.68/105,426.38 = 42,405.08/x
3. Step 3: Cross multiply
   76,396.68x = 105,426.38 × 42,405.08
4. Step 4: Simplify right side
   76,396.68x = 4,470,613,338.85
5. Step 5: Solve for x
   x = 4,470,613,338.85/76,396.68
6. Step 6: Final answer
   x = 58,518.42