Finding the Fourth Proportional to 49,116.49, 67,788.94 and 28,978.36

Step by Step Solution

1. Step 1: Write the proportion equation
   49,116.49 : 67,788.94 = 28,978.36 : x
2. Step 2: Convert to fraction form
   49,116.49/67,788.94 = 28,978.36/x
3. Step 3: Cross multiply
   49,116.49x = 67,788.94 × 28,978.36
4. Step 4: Simplify right side
   49,116.49x = 1,964,411,968.39
5. Step 5: Solve for x
   x = 1,964,411,968.39/49,116.49
6. Step 6: Final answer
   x = 39,994.96