Finding the Fourth Proportional to 28,980.56, 39,981.12 and 19,532.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,980.56 : 39,981.12 = 19,532.72 : x
2. Step 2: Convert to fraction form
   28,980.56/39,981.12 = 19,532.72/x
3. Step 3: Cross multiply
   28,980.56x = 39,981.12 × 19,532.72
4. Step 4: Simplify right side
   28,980.56x = 780,940,022.25
5. Step 5: Solve for x
   x = 780,940,022.25/28,980.56
6. Step 6: Final answer
   x = 26,947.03