Finding the Fourth Proportional to 76,399.32, 105,439.02 and 42,865.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,399.32 : 105,439.02 = 42,865.56 : x
2. Step 2: Convert to fraction form
   76,399.32/105,439.02 = 42,865.56/x
3. Step 3: Cross multiply
   76,399.32x = 105,439.02 × 42,865.56
4. Step 4: Simplify right side
   76,399.32x = 4,519,702,638.15
5. Step 5: Solve for x
   x = 4,519,702,638.15/76,399.32
6. Step 6: Final answer
   x = 59,158.94