Finding the Fourth Proportional to 31,093.31, 42,908.78 and 16,946.17

Step by Step Solution

1. Step 1: Write the proportion equation
   31,093.31 : 42,908.78 = 16,946.17 : x
2. Step 2: Convert to fraction form
   31,093.31/42,908.78 = 16,946.17/x
3. Step 3: Cross multiply
   31,093.31x = 42,908.78 × 16,946.17
4. Step 4: Simplify right side
   31,093.31x = 727,139,415.47
5. Step 5: Solve for x
   x = 727,139,415.47/31,093.31
6. Step 6: Final answer
   x = 23,385.72