Finding the Fourth Proportional to 76,968.96, 106,218.82 and 42,513.60

Step by Step Solution

1. Step 1: Write the proportion equation
   76,968.96 : 106,218.82 = 42,513.60 : x
2. Step 2: Convert to fraction form
   76,968.96/106,218.82 = 42,513.60/x
3. Step 3: Cross multiply
   76,968.96x = 106,218.82 × 42,513.60
4. Step 4: Simplify right side
   76,968.96x = 4,515,744,425.95
5. Step 5: Solve for x
   x = 4,515,744,425.95/76,968.96
6. Step 6: Final answer
   x = 58,669.68