Finding the Fourth Proportional to 31,088.34, 42,900.66 and 16,940.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,088.34 : 42,900.66 = 16,940.88 : x
2. Step 2: Convert to fraction form
   31,088.34/42,900.66 = 16,940.88/x
3. Step 3: Cross multiply
   31,088.34x = 42,900.66 × 16,940.88
4. Step 4: Simplify right side
   31,088.34x = 726,774,932.98
5. Step 5: Solve for x
   x = 726,774,932.98/31,088.34
6. Step 6: Final answer
   x = 23,377.73