Finding the Fourth Proportional to 31,093.16, 42,908.80 and 16,945.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,093.16 : 42,908.80 = 16,945.96 : x
2. Step 2: Convert to fraction form
   31,093.16/42,908.80 = 16,945.96/x
3. Step 3: Cross multiply
   31,093.16x = 42,908.80 × 16,945.96
4. Step 4: Simplify right side
   31,093.16x = 727,130,808.45
5. Step 5: Solve for x
   x = 727,130,808.45/31,093.16
6. Step 6: Final answer
   x = 23,385.56