Finding the Fourth Proportional to 31,090.18, 42,904.20 and 16,943.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,090.18 : 42,904.20 = 16,943.26 : x
2. Step 2: Convert to fraction form
   31,090.18/42,904.20 = 16,943.26/x
3. Step 3: Cross multiply
   31,090.18x = 42,904.20 × 16,943.26
4. Step 4: Simplify right side
   31,090.18x = 726,937,015.69
5. Step 5: Solve for x
   x = 726,937,015.69/31,090.18
6. Step 6: Final answer
   x = 23,381.56