Finding the Fourth Proportional to 31,090.96, 42,905.46 and 16,943.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,090.96 : 42,905.46 = 16,943.77 : x
2. Step 2: Convert to fraction form
   31,090.96/42,905.46 = 16,943.77/x
3. Step 3: Cross multiply
   31,090.96x = 42,905.46 × 16,943.77
4. Step 4: Simplify right side
   31,090.96x = 726,980,245.98
5. Step 5: Solve for x
   x = 726,980,245.98/31,090.96
6. Step 6: Final answer
   x = 23,382.37