Finding the Fourth Proportional to 76,309.05, 105,306.49 and 42,322.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,309.05 : 105,306.49 = 42,322.72 : x
2. Step 2: Convert to fraction form
   76,309.05/105,306.49 = 42,322.72/x
3. Step 3: Cross multiply
   76,309.05x = 105,306.49 × 42,322.72
4. Step 4: Simplify right side
   76,309.05x = 4,456,857,090.45
5. Step 5: Solve for x
   x = 4,456,857,090.45/76,309.05
6. Step 6: Final answer
   x = 58,405.35