Finding the Fourth Proportional to 16,012.62, 22,105.51 and 10,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,012.62 : 22,105.51 = 10,978.88 : x
2. Step 2: Convert to fraction form
   16,012.62/22,105.51 = 10,978.88/x
3. Step 3: Cross multiply
   16,012.62x = 22,105.51 × 10,978.88
4. Step 4: Simplify right side
   16,012.62x = 242,693,603.65
5. Step 5: Solve for x
   x = 242,693,603.65/16,012.62
6. Step 6: Final answer
   x = 15,156.40