Finding the Fourth Proportional to 76,404, 105,436.68 and 42,412.76

Step by Step Solution

1. Step 1: Write the proportion equation
   76,404 : 105,436.68 = 42,412.76 : x
2. Step 2: Convert to fraction form
   76,404/105,436.68 = 42,412.76/x
3. Step 3: Cross multiply
   76,404x = 105,436.68 × 42,412.76
4. Step 4: Simplify right side
   76,404x = 4,471,860,604.04
5. Step 5: Solve for x
   x = 4,471,860,604.04/76,404
6. Step 6: Final answer
   x = 58,529.14