Finding the Fourth Proportional to 76,395.75, 105,421.28 and 42,404.91

Step by Step Solution

1. Step 1: Write the proportion equation
   76,395.75 : 105,421.28 = 42,404.91 : x
2. Step 2: Convert to fraction form
   76,395.75/105,421.28 = 42,404.91/x
3. Step 3: Cross multiply
   76,395.75x = 105,421.28 × 42,404.91
4. Step 4: Simplify right side
   76,395.75x = 4,470,379,678.46
5. Step 5: Solve for x
   x = 4,470,379,678.46/76,395.75
6. Step 6: Final answer
   x = 58,516.08