Finding the Fourth Proportional to 67,978, 93,816.33 and 39,298.90

Step by Step Solution

1. Step 1: Write the proportion equation
   67,978 : 93,816.33 = 39,298.90 : x
2. Step 2: Convert to fraction form
   67,978/93,816.33 = 39,298.90/x
3. Step 3: Cross multiply
   67,978x = 93,816.33 × 39,298.90
4. Step 4: Simplify right side
   67,978x = 3,686,878,571.04
5. Step 5: Solve for x
   x = 3,686,878,571.04/67,978
6. Step 6: Final answer
   x = 54,236.35