Finding the Fourth Proportional to 15,591.69, 21,516.72 and 8,877.32

Step by Step Solution

1. Step 1: Write the proportion equation
   15,591.69 : 21,516.72 = 8,877.32 : x
2. Step 2: Convert to fraction form
   15,591.69/21,516.72 = 8,877.32/x
3. Step 3: Cross multiply
   15,591.69x = 21,516.72 × 8,877.32
4. Step 4: Simplify right side
   15,591.69x = 191,010,701.21
5. Step 5: Solve for x
   x = 191,010,701.21/15,591.69
6. Step 6: Final answer
   x = 12,250.80