Finding the Fourth Proportional to 76,438.16, 105,488.17 and 42,446.77

Step by Step Solution

1. Step 1: Write the proportion equation
   76,438.16 : 105,488.17 = 42,446.77 : x
2. Step 2: Convert to fraction form
   76,438.16/105,488.17 = 42,446.77/x
3. Step 3: Cross multiply
   76,438.16x = 105,488.17 × 42,446.77
4. Step 4: Simplify right side
   76,438.16x = 4,477,632,468.83
5. Step 5: Solve for x
   x = 4,477,632,468.83/76,438.16
6. Step 6: Final answer
   x = 58,578.50