Finding the Fourth Proportional to 15,291.72, 22,903.34 and 13,291.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,291.72 : 22,903.34 = 13,291.72 : x
2. Step 2: Convert to fraction form
   15,291.72/22,903.34 = 13,291.72/x
3. Step 3: Cross multiply
   15,291.72x = 22,903.34 × 13,291.72
4. Step 4: Simplify right side
   15,291.72x = 304,424,782.34
5. Step 5: Solve for x
   x = 304,424,782.34/15,291.72
6. Step 6: Final answer
   x = 19,907.82