Finding the Fourth Proportional to 18,884.16, 28,300.72 and 7,191.00

Step by Step Solution

1. Step 1: Write the proportion equation
   18,884.16 : 28,300.72 = 7,191.00 : x
2. Step 2: Convert to fraction form
   18,884.16/28,300.72 = 7,191.00/x
3. Step 3: Cross multiply
   18,884.16x = 28,300.72 × 7,191.00
4. Step 4: Simplify right side
   18,884.16x = 203,510,300.06
5. Step 5: Solve for x
   x = 203,510,300.06/18,884.16
6. Step 6: Final answer
   x = 10,776.78