Finding the Fourth Proportional to 31,072.78, 42,880.89 and 16,925.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,072.78 : 42,880.89 = 16,925.63 : x
2. Step 2: Convert to fraction form
   31,072.78/42,880.89 = 16,925.63/x
3. Step 3: Cross multiply
   31,072.78x = 42,880.89 × 16,925.63
4. Step 4: Simplify right side
   31,072.78x = 725,785,927.28
5. Step 5: Solve for x
   x = 725,785,927.28/31,072.78
6. Step 6: Final answer
   x = 23,357.61