Finding the Fourth Proportional to 76,642.83, 105,769.13 and 42,653.61

Step by Step Solution

1. Step 1: Write the proportion equation
   76,642.83 : 105,769.13 = 42,653.61 : x
2. Step 2: Convert to fraction form
   76,642.83/105,769.13 = 42,653.61/x
3. Step 3: Cross multiply
   76,642.83x = 105,769.13 × 42,653.61
4. Step 4: Simplify right side
   76,642.83x = 4,511,435,007.79
5. Step 5: Solve for x
   x = 4,511,435,007.79/76,642.83
6. Step 6: Final answer
   x = 58,863.11