Finding the Fourth Proportional to 76,284.38, 105,283.34 and 42,300.43

Step by Step Solution

1. Step 1: Write the proportion equation
   76,284.38 : 105,283.34 = 42,300.43 : x
2. Step 2: Convert to fraction form
   76,284.38/105,283.34 = 42,300.43/x
3. Step 3: Cross multiply
   76,284.38x = 105,283.34 × 42,300.43
4. Step 4: Simplify right side
   76,284.38x = 4,453,530,475.69
5. Step 5: Solve for x
   x = 4,453,530,475.69/76,284.38
6. Step 6: Final answer
   x = 58,380.63