Finding the Fourth Proportional to 31,047.40, 42,822.30 and 19,707.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,047.40 : 42,822.30 = 19,707.04 : x
2. Step 2: Convert to fraction form
   31,047.40/42,822.30 = 19,707.04/x
3. Step 3: Cross multiply
   31,047.40x = 42,822.30 × 19,707.04
4. Step 4: Simplify right side
   31,047.40x = 843,900,778.99
5. Step 5: Solve for x
   x = 843,900,778.99/31,047.40
6. Step 6: Final answer
   x = 27,181.05