Finding the Fourth Proportional to 31,053.11, 42,853.46 and 16,906.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,053.11 : 42,853.46 = 16,906.32 : x
2. Step 2: Convert to fraction form
   31,053.11/42,853.46 = 16,906.32/x
3. Step 3: Cross multiply
   31,053.11x = 42,853.46 × 16,906.32
4. Step 4: Simplify right side
   31,053.11x = 724,494,223.34
5. Step 5: Solve for x
   x = 724,494,223.34/31,053.11
6. Step 6: Final answer
   x = 23,330.81