Finding the Fourth Proportional to 98,978.67, 148,481.37 and 28,857.38

Step by Step Solution

1. Step 1: Write the proportion equation
   98,978.67 : 148,481.37 = 28,857.38 : x
2. Step 2: Convert to fraction form
   98,978.67/148,481.37 = 28,857.38/x
3. Step 3: Cross multiply
   98,978.67x = 148,481.37 × 28,857.38
4. Step 4: Simplify right side
   98,978.67x = 4,284,782,574.60
5. Step 5: Solve for x
   x = 4,284,782,574.60/98,978.67
6. Step 6: Final answer
   x = 43,289.96