Finding the Fourth Proportional to 76,309.39, 105,306.43 and 42,317.84

Step by Step Solution

1. Step 1: Write the proportion equation
   76,309.39 : 105,306.43 = 42,317.84 : x
2. Step 2: Convert to fraction form
   76,309.39/105,306.43 = 42,317.84/x
3. Step 3: Cross multiply
   76,309.39x = 105,306.43 × 42,317.84
4. Step 4: Simplify right side
   76,309.39x = 4,456,340,892.53
5. Step 5: Solve for x
   x = 4,456,340,892.53/76,309.39
6. Step 6: Final answer
   x = 58,398.33