Finding the Fourth Proportional to 28,156.84, 38,849.89 and 16,830

Step by Step Solution

1. Step 1: Write the proportion equation
   28,156.84 : 38,849.89 = 16,830 : x
2. Step 2: Convert to fraction form
   28,156.84/38,849.89 = 16,830/x
3. Step 3: Cross multiply
   28,156.84x = 38,849.89 × 16,830
4. Step 4: Simplify right side
   28,156.84x = 653,843,648.70
5. Step 5: Solve for x
   x = 653,843,648.70/28,156.84
6. Step 6: Final answer
   x = 23,221.49