Finding the Fourth Proportional to 49,021.38, 67,663.89 and 31,130.10

Step by Step Solution

1. Step 1: Write the proportion equation
   49,021.38 : 67,663.89 = 31,130.10 : x
2. Step 2: Convert to fraction form
   49,021.38/67,663.89 = 31,130.10/x
3. Step 3: Cross multiply
   49,021.38x = 67,663.89 × 31,130.10
4. Step 4: Simplify right side
   49,021.38x = 2,106,383,662.09
5. Step 5: Solve for x
   x = 2,106,383,662.09/49,021.38
6. Step 6: Final answer
   x = 42,968.67