Finding the Fourth Proportional to 76,787.33, 105,965.42 and 42,797.09

Step by Step Solution

1. Step 1: Write the proportion equation
   76,787.33 : 105,965.42 = 42,797.09 : x
2. Step 2: Convert to fraction form
   76,787.33/105,965.42 = 42,797.09/x
3. Step 3: Cross multiply
   76,787.33x = 105,965.42 × 42,797.09
4. Step 4: Simplify right side
   76,787.33x = 4,535,011,667.56
5. Step 5: Solve for x
   x = 4,535,011,667.56/76,787.33
6. Step 6: Final answer
   x = 59,059.38