Finding the Fourth Proportional to 31,047.90, 42,822.99 and 19,707.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,047.90 : 42,822.99 = 19,707.54 : x
2. Step 2: Convert to fraction form
   31,047.90/42,822.99 = 19,707.54/x
3. Step 3: Cross multiply
   31,047.90x = 42,822.99 × 19,707.54
4. Step 4: Simplify right side
   31,047.90x = 843,935,788.34
5. Step 5: Solve for x
   x = 843,935,788.34/31,047.90
6. Step 6: Final answer
   x = 27,181.74