Finding the Fourth Proportional to 76,640.58, 105,766.02 and 42,651.36

Step by Step Solution

1. Step 1: Write the proportion equation
   76,640.58 : 105,766.02 = 42,651.36 : x
2. Step 2: Convert to fraction form
   76,640.58/105,766.02 = 42,651.36/x
3. Step 3: Cross multiply
   76,640.58x = 105,766.02 × 42,651.36
4. Step 4: Simplify right side
   76,640.58x = 4,511,064,594.79
5. Step 5: Solve for x
   x = 4,511,064,594.79/76,640.58
6. Step 6: Final answer
   x = 58,860.00