Finding the Fourth Proportional to 13,191.68, 18,200.96 and 7,884.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.68 : 18,200.96 = 7,884.16 : x
2. Step 2: Convert to fraction form
   13,191.68/18,200.96 = 7,884.16/x
3. Step 3: Cross multiply
   13,191.68x = 18,200.96 × 7,884.16
4. Step 4: Simplify right side
   13,191.68x = 143,499,280.79
5. Step 5: Solve for x
   x = 143,499,280.79/13,191.68
6. Step 6: Final answer
   x = 10,878.01