Finding the Fourth Proportional to 76,397.20, 105,423.14 and 42,404.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,397.20 : 105,423.14 = 42,404.06 : x
2. Step 2: Convert to fraction form
   76,397.20/105,423.14 = 42,404.06/x
3. Step 3: Cross multiply
   76,397.20x = 105,423.14 × 42,404.06
4. Step 4: Simplify right side
   76,397.20x = 4,470,369,153.95
5. Step 5: Solve for x
   x = 4,470,369,153.95/76,397.20
6. Step 6: Final answer
   x = 58,514.83