Finding the Fourth Proportional to 43,978.05, 65,967.21 and 10,698.12

Step by Step Solution

1. Step 1: Write the proportion equation
   43,978.05 : 65,967.21 = 10,698.12 : x
2. Step 2: Convert to fraction form
   43,978.05/65,967.21 = 10,698.12/x
3. Step 3: Cross multiply
   43,978.05x = 65,967.21 × 10,698.12
4. Step 4: Simplify right side
   43,978.05x = 705,725,128.65
5. Step 5: Solve for x
   x = 705,725,128.65/43,978.05
6. Step 6: Final answer
   x = 16,047.21