Finding the Fourth Proportional to 76,446.30, 105,499.39 and 42,454.94

Step by Step Solution

1. Step 1: Write the proportion equation
   76,446.30 : 105,499.39 = 42,454.94 : x
2. Step 2: Convert to fraction form
   76,446.30/105,499.39 = 42,454.94/x
3. Step 3: Cross multiply
   76,446.30x = 105,499.39 × 42,454.94
4. Step 4: Simplify right side
   76,446.30x = 4,478,970,272.49
5. Step 5: Solve for x
   x = 4,478,970,272.49/76,446.30
6. Step 6: Final answer
   x = 58,589.76