Finding the Fourth Proportional to 76,429.21, 105,470.83 and 42,435.94

Step by Step Solution

1. Step 1: Write the proportion equation
   76,429.21 : 105,470.83 = 42,435.94 : x
2. Step 2: Convert to fraction form
   76,429.21/105,470.83 = 42,435.94/x
3. Step 3: Cross multiply
   76,429.21x = 105,470.83 × 42,435.94
4. Step 4: Simplify right side
   76,429.21x = 4,475,753,813.63
5. Step 5: Solve for x
   x = 4,475,753,813.63/76,429.21
6. Step 6: Final answer
   x = 58,560.78