Finding the Fourth Proportional to 31,070.81, 42,877.89 and 16,923.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,070.81 : 42,877.89 = 16,923.69 : x
2. Step 2: Convert to fraction form
   31,070.81/42,877.89 = 16,923.69/x
3. Step 3: Cross multiply
   31,070.81x = 42,877.89 × 16,923.69
4. Step 4: Simplify right side
   31,070.81x = 725,652,118.21
5. Step 5: Solve for x
   x = 725,652,118.21/31,070.81
6. Step 6: Final answer
   x = 23,354.78