Finding the Fourth Proportional to 76,293.69, 105,286.56 and 42,303.61

Step by Step Solution

1. Step 1: Write the proportion equation
   76,293.69 : 105,286.56 = 42,303.61 : x
2. Step 2: Convert to fraction form
   76,293.69/105,286.56 = 42,303.61/x
3. Step 3: Cross multiply
   76,293.69x = 105,286.56 × 42,303.61
4. Step 4: Simplify right side
   76,293.69x = 4,454,001,097.75
5. Step 5: Solve for x
   x = 4,454,001,097.75/76,293.69
6. Step 6: Final answer
   x = 58,379.68