Finding the Fourth Proportional to 31,036.84, 42,830.76 and 16,889.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.84 : 42,830.76 = 16,889.68 : x
2. Step 2: Convert to fraction form
   31,036.84/42,830.76 = 16,889.68/x
3. Step 3: Cross multiply
   31,036.84x = 42,830.76 × 16,889.68
4. Step 4: Simplify right side
   31,036.84x = 723,397,830.56
5. Step 5: Solve for x
   x = 723,397,830.56/31,036.84
6. Step 6: Final answer
   x = 23,307.72