Finding the Fourth Proportional to 15,290.10, 21,101.18 and 8,577.86

Step by Step Solution

1. Step 1: Write the proportion equation
   15,290.10 : 21,101.18 = 8,577.86 : x
2. Step 2: Convert to fraction form
   15,290.10/21,101.18 = 8,577.86/x
3. Step 3: Cross multiply
   15,290.10x = 21,101.18 × 8,577.86
4. Step 4: Simplify right side
   15,290.10x = 181,002,819.48
5. Step 5: Solve for x
   x = 181,002,819.48/15,290.10
6. Step 6: Final answer
   x = 11,837.91