Finding the Fourth Proportional to 67,978.68, 101,982.60 and 28,513.05

Step by Step Solution

1. Step 1: Write the proportion equation
   67,978.68 : 101,982.60 = 28,513.05 : x
2. Step 2: Convert to fraction form
   67,978.68/101,982.60 = 28,513.05/x
3. Step 3: Cross multiply
   67,978.68x = 101,982.60 × 28,513.05
4. Step 4: Simplify right side
   67,978.68x = 2,907,834,972.93
5. Step 5: Solve for x
   x = 2,907,834,972.93/67,978.68
6. Step 6: Final answer
   x = 42,775.69