Finding the Fourth Proportional to 76,245.69, 105,216.01 and 42,255.63

Step by Step Solution

1. Step 1: Write the proportion equation
   76,245.69 : 105,216.01 = 42,255.63 : x
2. Step 2: Convert to fraction form
   76,245.69/105,216.01 = 42,255.63/x
3. Step 3: Cross multiply
   76,245.69x = 105,216.01 × 42,255.63
4. Step 4: Simplify right side
   76,245.69x = 4,445,968,788.64
5. Step 5: Solve for x
   x = 4,445,968,788.64/76,245.69
6. Step 6: Final answer
   x = 58,311.08