Finding the Fourth Proportional to 49,978.92, 74,968.42 and 13,042.92

Step by Step Solution

1. Step 1: Write the proportion equation
   49,978.92 : 74,968.42 = 13,042.92 : x
2. Step 2: Convert to fraction form
   49,978.92/74,968.42 = 13,042.92/x
3. Step 3: Cross multiply
   49,978.92x = 74,968.42 × 13,042.92
4. Step 4: Simplify right side
   49,978.92x = 977,807,104.59
5. Step 5: Solve for x
   x = 977,807,104.59/49,978.92
6. Step 6: Final answer
   x = 19,564.39