Finding the Fourth Proportional to 76,406.77, 105,453.92 and 42,426.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,406.77 : 105,453.92 = 42,426.12 : x
2. Step 2: Convert to fraction form
   76,406.77/105,453.92 = 42,426.12/x
3. Step 3: Cross multiply
   76,406.77x = 105,453.92 × 42,426.12
4. Step 4: Simplify right side
   76,406.77x = 4,474,000,664.39
5. Step 5: Solve for x
   x = 4,474,000,664.39/76,406.77
6. Step 6: Final answer
   x = 58,555.03