Finding the Fourth Proportional to 31,070.15, 42,876.79 and 16,923

Step by Step Solution

1. Step 1: Write the proportion equation
   31,070.15 : 42,876.79 = 16,923 : x
2. Step 2: Convert to fraction form
   31,070.15/42,876.79 = 16,923/x
3. Step 3: Cross multiply
   31,070.15x = 42,876.79 × 16,923
4. Step 4: Simplify right side
   31,070.15x = 725,603,832.56
5. Step 5: Solve for x
   x = 725,603,832.56/31,070.15
6. Step 6: Final answer
   x = 23,353.73