Finding the Fourth Proportional to 76,586.77, 105,692.67 and 42,597.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,586.77 : 105,692.67 = 42,597.72 : x
2. Step 2: Convert to fraction form
   76,586.77/105,692.67 = 42,597.72/x
3. Step 3: Cross multiply
   76,586.77x = 105,692.67 × 42,597.72
4. Step 4: Simplify right side
   76,586.77x = 4,502,267,179.78
5. Step 5: Solve for x
   x = 4,502,267,179.78/76,586.77
6. Step 6: Final answer
   x = 58,786.48