Finding the Fourth Proportional to 29,406.69, 40,581.61 and 15,978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   29,406.69 : 40,581.61 = 15,978.17 : x
2. Step 2: Convert to fraction form
   29,406.69/40,581.61 = 15,978.17/x
3. Step 3: Cross multiply
   29,406.69x = 40,581.61 × 15,978.17
4. Step 4: Simplify right side
   29,406.69x = 648,419,924.96
5. Step 5: Solve for x
   x = 648,419,924.96/29,406.69
6. Step 6: Final answer
   x = 22,050.08