Finding the Fourth Proportional to 76,333.49, 105,336.55 and 42,339.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76,333.49 : 105,336.55 = 42,339.31 : x
2. Step 2: Convert to fraction form
   76,333.49/105,336.55 = 42,339.31/x
3. Step 3: Cross multiply
   76,333.49x = 105,336.55 × 42,339.31
4. Step 4: Simplify right side
   76,333.49x = 4,459,876,634.36
5. Step 5: Solve for x
   x = 4,459,876,634.36/76,333.49
6. Step 6: Final answer
   x = 58,426.21