Finding the Fourth Proportional to 19,980.50, 29,965.59 and 5,937.21

Step by Step Solution

1. Step 1: Write the proportion equation
   19,980.50 : 29,965.59 = 5,937.21 : x
2. Step 2: Convert to fraction form
   19,980.50/29,965.59 = 5,937.21/x
3. Step 3: Cross multiply
   19,980.50x = 29,965.59 × 5,937.21
4. Step 4: Simplify right side
   19,980.50x = 177,912,000.60
5. Step 5: Solve for x
   x = 177,912,000.60/19,980.50
6. Step 6: Final answer
   x = 8,904.28