Finding the Fourth Proportional to 15,003.22, 22,499.88 and 5,142.28

Step by Step Solution

1. Step 1: Write the proportion equation
   15,003.22 : 22,499.88 = 5,142.28 : x
2. Step 2: Convert to fraction form
   15,003.22/22,499.88 = 5,142.28/x
3. Step 3: Cross multiply
   15,003.22x = 22,499.88 × 5,142.28
4. Step 4: Simplify right side
   15,003.22x = 115,700,682.93
5. Step 5: Solve for x
   x = 115,700,682.93/15,003.22
6. Step 6: Final answer
   x = 7,711.72